Answer: The alkali metals will lose an electron to resemble the next lowest noble gas; thus, all the alkali metals form +1 ions. K loses an electron so that it will have the same electron configuration as Ne.
1A or group 1
Hope this helps! Have a good day!
The electron configuration of alkali metals would then resemble those of group 17 of the periodic table in the compounds they form.
What is periodic table?Periodic table is defined as a tabular approach of showing the items so that they appear in the same vertical column or group when their attributes are similar. Phosphorus is the oldest chemical element, and hassium is the newest. Please take note that, unlike in the Periodic system, the elements do not exhibit their natural relationships with one another.
The elements that make up group 17 of the periodic table are the halogens. They are nonmetals that are reactive, such as iodine, bromine, chlorine, and fluorine. Halogens are non-metals that are very reactive. These substances share a lot of characteristics with one another.
Thus, the electron configuration of alkali metals would then resemble those of group 17 of the periodic table in the compounds they form.
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how many ml of propyl alcohol are required to make a 9.17% (v/v) aqueous solution in a 250. ml volumetric flask?
2,726.28 mL solution of propyl alcohol is required to make a 9.17% (v/v) aqueous solution in a 250. ml.
A solution's volume-by-volume percent concentration,
9.17% v/v is a measure of how many milliliters of solute it contains in 100 mL of solution.
In this case,
9.17% v/v solution will contain -
9.17 mL of solute for every 100 mL of solution.
This means that in order to have propyl alcohol required to make a 9.17% (v/v) aqueous solution in 250 ml of solute, you need to have
250 mL solute× 100 mL solution/ 9.17mL solute
=2,726.28 mL solution.
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What is social anxiety disorder?
Answer:
You might get nervous and anxiety about meeting up in society
Given the equation representing a reaction at
equilibrium:
N2(g) + 3H2(g) <==> 2NH3(g) + energy
Which change causes the equilibrium to shift to
the right?
(1) decreasing the concentration of H2(g)
(2) decreasing the pressure
(3) increasing the concentration of N2(g)
(4) increasing the temperatur
Increasing the concentration of N2(g) will causes the equilibrium to shift to the right.
Chemical equilibria can be shifted by changing the conditions that the system experiences. We say that we "stress" the equilibrium. When we stress the equilibrium, the chemical reaction is no longer at equilibrium, and the reaction starts to move back toward equilibrium in such a way as to decrease the stress.
According to Le Chatelier's principle, a change in one of the variables that describe a system at equilibrium produces a shift in the position of the equilibrium that counteracts the effect of this change.
In the synthesis of ammonia the equilibrium will shift to right only when we increase the concentration of N2(g). Because increasing nitrogen gas causes more ammonia to be produced, so the concentration of ammonia must increase.
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W hitch role of water is significant for most living things in a biological system
Answer:
to drink
Explanation:
we all need water to drink without it we'll all be dead
Draw the major product formed when hbr reacts with the epoxide. Use wedge–dash bonds, including hydrogen atoms at each stereogenic center, to show the stereochemistry of the product.
An generally pro of HBr results in a molecule called halohydrin in this process. The oxygen carrier in the epoxide will be protonated by the hydrogen, and then the bromide ion will attack the more.
What is stereochemistry and examples?Stereochemistry is the study of a material's four structural elements. The location of the particle's electrons in 3 dimensions is the only structural distinction between the enantiomers known as cis and trans isomers. There may be differences in the physicochemical characteristics of these stereoisomers.
What does stereochemistry provide as a means of?Chemists can determine the connections between several molecules consisting of the same atoms by using stereochemistry. They can also research how these linkages affect the physical and biological characteristics that molecules possess.
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the electron configuration filling patterns of some elements in group 6b(6) and group 1b(11) reflect the of half-filled and completely filled sublevels. multiple choice question. decreased stability penetration scarcity increased stability
The electronic configuration packing patterns of some elements in group 6b(6) and group 1b(11) reflect the enhanced stability of half-filled and fully-filled sublevels. So option (c) is correct.
What is electronic configuration?The electronic configuration of an element describes how the electrons are distributed in its atomic orbitals. For example, the electron configuration of sodium is 1s²2s²2p⁶3s¹
The three rules that direct the manner in which electrons are to be filled in atomic orbitals are:
Aufbau principle: Electrons must completely fill the atomic orbitals of a given energy level before occupying an orbital of a higher energy level. Electrons fill orbitals in the increasing order of orbital energy level.
Pauli’s exclusion principle: It states that two electrons can never have equal values for all four quantum numbers. Also each subshell of an orbital can have a maximum of 2 electrons and both these electrons must have opposite spins.
Hund’s rule of maximum multiplicity: The subshells in an orbital must be singly occupied before it is doubly occupied. Furthermore, the spin of all the electrons in singly occupied subshells should be the same (to maximize the overall spin).
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The x-ray has a frequency of 1.4 x 1019 Hz. What is the energy associated with one x-ray? A. 2.1 x 1052 J
B. 4.7 x 10-53 J
C. 2.1 x 10-¹¹ J
D. 9.3 x 10-¹5 J
I would have to go with D
Hope this helps
Answer:
just give the other person brainliest
Explanation:
why were alpha particles the only radioactive particle that could have been used in rutherfords gold foil experiment
Alpha particles are the only radioactive particle that could have been used in the Rutherford gold foil experiment because they are produced naturally by radioactive nuclides that are alpha emitters and so a steady supply was easy to obtain.
As alpha particles do not travel very far from their radioactive source. They cannot pass through a piece of paper, clothes, or even the layer of dead cells which normally protects the skin.
Rutherford used alpha particles in his gold foil experiment in part because his previous research on radioactive decay discovered alpha particles. He wanted to test how alpha particles, which are positively charged, would react with various forms of matter.
Therefore Rutherford uses alpha particles in the Rutherford gold foil experiment.
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the modern periodic table arranges the elements according to their atomic number and shared properties. if you wanted to predict which elements are explosive how would you organize the periodic table?
High explosive elements should be placed on the right side of the periodic table and lower explosive elements should be placed on the left side.
We will organize the periodic table starting from least explosive to high explosive just like the arrangement is done in the modern periodic table in which elements having lower atomic numbers are present on the left side of the periodic table whereas the elements having higher atomic numbers are placed on the right side of the periodic table.
What is the periodic table?
The periodic table is the tabular arrangement of all the chemical elements on the basis of their respective atomic numbers.
Why the periodic table is important?
The periodic table of elements puts all the known elements into groups with similar properties.
Thus, lower explosive elements are placed on the left and high explosive elements are placed on the right of the periodic table.
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if someone wanted to build a scale model of the atom with a nucleus 1.00 m in diameter, how far away would the nearest electron need to be?
So an atom with a radius of 50 kilometers would be required for a nucleus that was 1 meter in size.
What is nucleus and its function?The nucleus is the center of the cell and contains the DNA and other structures that contain the genetic material (such as growth and metabolism). Inside the nucleus, tiny structures known as nucleoli are frequently seen. The gel-like structure within which nuclear components are hung is known as the cell nucleus.
Where can you find the nucleus?When one look at a photograph of a cell, one of the parts that stands out the most is the nucleus. The nucleus, located at the center of the cell, is home to all of the chromosome, which are responsible for encoding the genetic material. The nuclear envelope, nucleolus, nuclear matrix, nucleosome, and nucleolus are some of the several structures that make up the nucleus.
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write the lewis structure for carbon dioxide, then answer the following questions: 1. how many valence electrons does this compound have? 2. how many bonded electrons does this compound have? 3. how many lone pairs of electrons does this compound have? 4. how many single bonds does this compound have?
Valence electrons in CO₂ = 16
Bonded electrons in CO₂ = 4 electrons of carbon and 2 electrons of each oxygen atom
Lone pairs of electrons in CO₂ = 2 l0ne pair of electrons on each oxygen atom
Single bonds in CO₂ = None
What is Lewis structure?A Lewis structure, also known as, Lewis dot structure, electron dot structure, is a diagram showing the bonds between the atoms of a molecule and the lone pairs of electrons present within the molecule.
Carbon dioxide is a colorless, odorless, non-flammable gas produced when carbon is burned. The ratio of carbon to oxygen in the CO₂ molecule is 1:2. Two double bonds join the carbon and oxygen atoms in the Lewis structure. There are two oxygen atoms at each end where they share electrons and form a bond with the central carbon atom. A Lewis structure diagram shows the number of valence electrons available for bond formation within an atom. You can also visualize the behavior of valence electrons in molecules and determine if lone pairs are present.
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how many milliliters of a stock solution of 2.00m mgso4 would you need to prepare 100.0ml of 0.400m mgso4
The volume of 2.00 M MgSO₄ is 20.0 mL.
Parameter
M₁ = 2.00 MM₂ = 0.400 MV₂ = volume of 0.400 M MgSO4 = 100.0 mLIf we added water to the first solution, the concentration changed but the mole in that solution didn't change.
Formula between mole, volume, and concentration (molarity)
[tex]M = \frac{n}{V}[/tex]
n = M×V
n = moleV = volume (mL)M = concentration (Molar)n₁=n₂
M₁×V₁ = M₂×V₂
2.000×V₁ = 0.400×100.0
2.000×V₁ = 40.0
[tex]V_1 = \frac{40.0}{2.000}[/tex]
V₁ = 20.0 mL
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the total translational kinetic energy of 17 moles of an ideal gas is 198,242 j. calculate the gas temperature in kelvin
The total translational kinetic energy of 17 moles of an ideal gas is 198,242 j . the gas temperature in kelvin is 937 K.
Given that :
total translational kinetic energy = 198242 J
moles = 17 mol = 17 × 6.023 × 10²³
Total kinetic energy = ( 3/2 KT ) × no. molecules
198242 = ( 3/2) ( 1.38 × 10⁻²³ ) T × 17 × 6.023 × 10²³
T = 198242 / 211.84
T = 937 K
Thus, The total translational kinetic energy of 17 moles of an ideal gas is 198,242 j . the gas temperature in kelvin is 937 K.
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Larisa pumps up a soccer ball until it has a gauge pressure of 61 kilopascals. The volume of the ball is 5.2 liters. The air temperature is 32°C, and the outside air is at standard pressure. How many moles of air are in the ball?
A. 0.13 mol
B. 0.33 mol
C. 1.2 mol
D. 3.2 mol
The number of mole of air in the ball, given that the volume of the ball is 5.2 litres is 0.13 mole (Option A)
How to determine the number of mole of airWe'll begin by listing out the given parameters from the question. This is given below:
Pressure (P) = 61 kilopascalsVolume (V) = 5.2 litresTemperature (T) = 32 °C = 32 + 273 = 305 KGas constant (R) = 8.314 L.KPa/Kmol Number of mole (n) =?From the above parameters, we can obtain the number of mole as follow
PV = nRT
61 × 5.2 = n × 8.314 × 305
317.2 = n × 2535.77
Divide both sides by 2535.77
n = 317.2 / 2535.77
n = 0.13 mole
Thus, the number of mole is 0.13 mole (Option A)
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ridget performed an investigation to determine if a television set transformed electrical energy into other types of energy. She recorded her observations in a table. What statement best describes the results? Question Observation Does it transform into heat energy? Yes Does it transform into light energy? Yes Does it transform into sound energy? Yes Does it transform into energy of motion? No A television transforms electrical energy into heat and light energy. Electrical energy transforms into more than one type of energy. Sound energy is transformed from heat and light energy. You can transform electrical energy into energy of motion.
The statements that best describe Bridget's recorded observations are:
Does it transform into heat energy? YesDoes it transform into light energy? YesDoes it transform into sound energy? YesDoes it transform into the energy of motion? No1 A television is a device that converts electrical energy into heat and light energy.
2 Electrical energy may be converted into other types of energy.
3 Sound energy is created by combining heat and light energy.
4 Electrical energy may be converted into motion energy.
Energy transfer is the process of transferring energy from one system to another, such as by heat, work, or mass transfer.
Energy is required for living organisms to grow, breathe, reproduce, and move. Because energy cannot be created from a vacuum or a void, it must be transported via the biosphere. The sun is the principal source of energy for practically every ecosystem on Earth.
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Full Question:
Bridget performed an investigation to determine if a television set transformed electrical energy into other types of energy. She recorded her observations in a table. What statement best describes the results?
Question Observation
Does it transform into heat energy?
Does it transform into light energy?
Does it transform into sound energy?
Does it transform into energy of motion?
sicl4 reacts with mg to produce mgcl2 and si (see video for balancing). if 17 g of silicon are required, how many grams of mg are needed?
If 17 grams of silicon are required, then 7.2 grams of Mg are needed to react.
The balanced chemical equation of the reaction of SiCl₄ and Mg is,
SiCl₄ + 2Mg → Si + 2MgCl₂
So, as we can see from the reaction,
2 moles of Mg reacts, it forms one mole of silicon.
We know,
Moles = Mass/molar mass
we can write,
2 moles of Mg = mole of Si
2 x mass/molar mass = mass/molar mass
Molar mass of Si is 28 g/mol.
Molar mass of Mg is 24 g/mol.
The mass of Silicon required is 17 grams.
Putting the values,
2 x mass/24 = 17/28
Mass of Mg required is 7.2 grams.
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you are working diligently in the chemistry laboratory when suddenly a small explosion occurs in the rear of the room, immediately and automatically capturing your attention. this is an example of
When you are working diligently in the chemistry lab, when suddenly a small explosion occurs in the rear of the room , immediately and automatically capturing your attention, this is an example of Reflexive attention.
What is reflexive attention?
Reflexive attention is essentially a semi-autonomous decision making system.
The brain regulates vital body functions such as heartbeat, movements and learning processes. Also, the brain controls the psychological processes such as memory, wakefulness, and attention.
Attention is categorized into two groups; voluntary and reflexive.
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When performing a presumptive blood test with Hemastix, why is it necessary to test an unstained area close to the bloodstain under examination as a control?
When performing a presumptive blood test with Hemastix, the reason why it necessary to test an unstained area close to the bloodstain under examination as a control is that the likelihood that there is presence of blood, and thus need confirmatory test in lab to know if it is actually blood.
What is the presumptive test for Hemastix?Hemastix reagent strips were initially created for the purpose of detecting blood in urine. It has been determined that this quick and simple test is useful as a presumptive test for the presence of blood.
Note that the presence of a chemical in a sample can be determined or confirmed using a presumptive test, which is a qualitative study. These decisions are typically made following a chemical reaction that results in the production of a certain color. A false positive occurs when a different chemical reacts similarly and yields the desired outcome.
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what is the primary difference between the oxidation of glucose to co2 by glycolysis and the citic acid cycle vs by the pentose phosphate
The primary difference between the oxidation of glucose to CO₂ by glycolysis and the critic acid cycle vs by the pentose phosphate is the glycolysis occurs in cytosol. to CO₂ is release of CO₂ is in mitochondria and in the pentose phosphate CO₂ is generated in the cytosol.
When the glucose oxidation takes place by glycolysis and the citric acid cycle , the total catabolism will occur. The energy is released and this energy is trapped in ATP. in this glucose is catabolizes. in pentose phosphate CO₂ is generated in the cytosol.
Thus, The primary difference between the oxidation of glucose to CO₂ by glycolysis and the critic acid cycle vs by the pentose phosphate is the glycolysis occurs in cytosol. to CO₂ is release of CO₂ is in mitochondria and in the pentose phosphate CO₂ is generated in the cytosol.
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what is the ph of a buffer in which the concentration of benzoic acid, c6h5cooh, is 0.075 m and the concentration of sodium benzoate, nac6h5coo, is 0.050 m ?
The answer is 4.02.
Benzoic acid is a weak acid and sodium hydroxide is a strong base. Benzoic acid and sodium hydroxide react to form sodium acetate and water to form a buffer solution. pH can be measured by measuring the voltage developed between two special electrodes immersed in a liquid solution.
Special glass electrodes are called measuring electrodes. It neutralizes benzoic acid to produce benzoate ions, which enter the water layer, leaving two other organic compounds in the ether. Similarly, nitroaniline does not dissolve under neutral or basic conditions but dissolves in acidic solutions. This clearly shows that formic acid is a stronger acid than benzoic acid.
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What are 4 non examples of condensation
Sleet ,freezing of raindrops, snowflakes Precipitation
are 4 non examples of condensation .
What is condensation ?
Condensation, the separation of a liquid or solid from a vapor, generally occurs on surfaces that are cooler than the adjacent gas. A substance condenses when the pressure exerted by that vapor exceeds the vapor pressure of the substance's liquid or solid phase at the temperature of the surface on which condensation is occurring. As the steam condenses, heat is released. If this heat is not removed, the surface temperature will rise until it matches the surrounding steam.
If the air does not contain small particles, so-called aerosols, condensation will only occur if the air is extremely supersaturated with water vapor.
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what is the molarity of potassium acetate in a solution made by adding 50 ml of 2.00 m nitric acid with enough water to make 450.0 ml of solution?
The molarity of potassium acetate in a solution made by adding 50 ml of 2.00 m nitric acid with enough water to make 450.0 ml of solution is 0.22 mol/L.
A chemical species' concentration in a solution, specifically the amount of a solute per unit volume of solution, is measured by its molar concentration. The number of moles per liter, denoted by the unit symbol mol/L or mol/dm³ in SI units, is the most often used unit denoting molarity in chemistry.
We know that, M₁V₁ = M₂V₂
Here, M₁ =?
V₁ = 450 mL
M₂ = 2 M
V₂ = 50 mL
M₁ × 450 = 2 × 50
M₁ = 100/450
M₁ = 0.22 mol / L
Thus, we need 0.22 mol/L of potassium acetate in a solution made by adding 50 ml of 2.00 m nitric acid with enough water to make 450.0 ml of solution.
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in the laboratory you dissolve 20.0 g of silver acetate in a volumetric flask and add water to a total volume of 125 ml. what is the molarity of the solution ? m. what is the concentration of the silver cation ? m. what is the concentration of the acetate anion ? m.
The molarity of the solution is 0.95M and the concentration of the Silver cation and the concentration of the acetate anion is also 0.95M.
The mass of the Silver Acetate dissolved in the water of volume 125 ml is 20 grams.
We can write the reaction of the dissolution of the Silver Acetate into water as,
CH₃COOAg = CH₃COO- + Ag+
It means that the concentration of the Silver cation and the Acetate anion is equal in the solution of water.
It means that the molarity of the solution will be equal to the concentration of the Silver cation and the concentration of the Acetate and iron in the water.
We know that the molarity of the solution is defined as the number of moles of solute per unit volume of the solution in litres.
Moles = mass/molar mass
Molar mass of the Silver Acetate is 166.91 g/mol.
The mass of silver Acetate dissolved is 20 grams.
So, the moles of silver Acetate is,
Moles = 20/166.91
Molarity of the solution,
Molarity = moles of silver acetate/volume of water
Molarity = 20/166.91 × 1000/125
Molarity = 0.95
So, the molarity of the Silver Acetate solution is 0.95M.
The concentration of the Silver cation and the concentration of the Acetate anion will be same as that of the molarity of the solution.
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what masses of bromoacetic acid (ch2brcooh) and sodium bromoacetate (ch2brcooh) are needed to prepare 1.00 l of ph
amount of bromoacetic acid = 22.2 grams
amountof sodium bromoacetate = 6.47 grams
Total concentration = 0.200 M
[CH2BrCOOH] + [CH2BrCOONa] = 0.200 M ...(1)
Ka = 2.00 x 10-3
pKa = -log(Ka)
pKa = -log(2.00 x 10-3)
pKa = 2.70
According to Henderson - Hasselbalch equation,
pH = pKa + log([conjugate base] / [weak acid])
2.100 = 2.70 + log([CH2BrCOONa] / [CH2BrCOOH])
log([CH2BrCOONa] / [CH2BrCOOH]) = 2.100 - 2.70
log([CH2BrCOONa] / [CH2BrCOOH]) = -0.60
[CH2BrCOONa] / [CH2BrCOOH] = 10-0.60
[CH2BrCOONa] / [CH2BrCOOH] = 0.252 ...(2)
Solving equations (1) and (2)
[CH2BrCOOH] = 0.160 M
[CH2BrCOONa] = 0.040 M
moles CH2BrCOONa = (molarity CH2BrCOONa) * (volume of buffer in Liter)
moles CH2BrCOONa = (0.040 M) * (1.00 L)
moles CH2BrCOONa = 0.040 mol
mass CH2BrCOONa = (moles CH2BrCOONa) * (molar mass CH2BrCOONa)
mass CH2BrCOONa = (0.040 mol) * (160.93 g/mol)
mass CH2BrCOONa = 6.47 g
moles CH2BrCOOH = (molarity CH2BrCOOH) * (volume of buffer in Liter)
moles CH2BrCOOH = (0.160 M) * (1.00 L)
moles CH2BrCOOH = 0.160 mol
mass CH2BrCOOH = (moles CH2BrCOOH) * (molar mass CH2BrCOOH)
mass CH2BrCOOH = (0.160 mol) * (138.95 g/mol)
mass CH2BrCOONa = 22.2 g
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Based on the Law of Conservation of Mass, what mass of products form when baking soda decomposes?
The mass of the products form when baking soda decomposes is 25.00 grams
How do I determine the mass of the products?We can determine the mass of the products formed by simply observing the law of conservation matter (mass). Details below
The law of conservation of matter states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.
Thus, for every balanced chemical equation, total mass of reactants must equal to the total mass of the product obtained.
With the above information, we can detertmine the mass of the products obtained as follow:
2NaHCO₃ → Na₂CO₃ + H₂O + CO₂
Mass of reactant = Mass of product
Mass of NaHCO₃ = Mass of (Na₂CO₃ + H₂O + CO₂)
25.00 g = 25.00 g
Thus, the mass of the products is 25.00 g
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pre-lab calculation suppose that 0.483 g of an unknown monoprotic weak acid (ha) is dissolved in water. if titration of this sample required 42.0 ml of 0.250 m naoh (aq) to reach the stoichiometric point, calculate the molar mass of this acid.
so, to calculate the molar of the monoprotic weak acid ;
first, we write the reactions
HA +NaOH → NaH +H20
42.0ml NaOH ( 1l NaOH / 1000 ml NaoH ) (0.250 m/ 1l NaOH) (1 mol HA/ 1 mol NaOH)
0.0105 moles HA
now, we calculate the molar mass
molar mass= mass/ moles
= 0.483 grams/ 0.0105 moles
= 46 grams/moles
the molar mass of the monoprotic weak acid is 46grams/moles
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Discuss energy use in animals. In your discussion, be sure to :
- Identify the type of protein molecules used to digest food
- Identify the organelle where energy from nutrients is released
- State one inference that can be made concerning a cell that has many of these organelles.
The type of protein molecules that is been used to digest food in the organism are:
chymotrypsin trypsin .The organelle where energy from nutrients is released is the Mitochondria.
One inference that can be made concerning a cell that has many of these organelles is that te utilization of the energy is balanced.
What is the organelle where energy from nutrients is released?The organelle where energy from nutrients is released is the Mitochondria , this organelles can be described as the one that look tiny inside cells and this is very essential in the cell because it helps in the p[roces of releasing energy from food.
It should be noted that this process is been refferd to as process of cellular respiration and this is the reason why the biologist do referred to mitochondria as the powerhouses of the cell because it involves the use of energy.
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a 125 g sample of lead at 85.0 c and a 320 g sample of silver at 34.0 c are added to 0.500 kg of water at room temperature (22.0 c) in an insulated container. assuming the system is thermally insulated, what is the final equilibrium temperature?
The final equilibrium temperature of the mixture of lead, silver, and water is 24.65°C. The result is obtained by using the Black's Principle.
What is Black's Principle?The Black's Principle states that heat released by a higher-temperature object is equal to the heat absorbed by a lower-temperature object. It can be expressed as
Q release = Q absorbs
Where
Q release is the heat released by high-temperature objects.Q absorb is the heat absorbed by low-temperature objects.The mass of lead is 125 g at 85°C, the mass of silver is 320 g at 34°C, and the mass of water is 0.5 kg at 22°C. All of them are mixed, so that the temperature of the lead and silver will fall and otherwise the temperature of water will rise.
The equation of the heat energy with the temperature change is
Q = m × c × ΔT
Where
m = massc = specific heat capacityΔT = change in temperatureThe data shows that:
c lead = 128 J/kg °Cc silver = 234 J/kg °Cc water = 4,186 J/kg °CThe equilibrium temperature is
Q release = Q absorbs
(m × c × ΔT)lead + (m × c × ΔT)silver = (m × c × ΔT)water
(0.125 × 128 × (85-T)) + (0.320 × 234 × (34-T)) = (0.500 × 4,186 × (T-22))
(16 × (85-T)) + (74.88 × (34-T)) = (2,100 × (T-22))
1,360 - 16T + 2,545.92 - 74.88T = 46,200 - 2,100T
2,190.88T = 50,105.92
T = 24.65°C
Hence, the final equilibrium temperature of the mixture is 24.65°C.
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what is the ph at the equivalence point of a weak base-strong acid titration if 20.00 ml of naoclrequires 28.30 ml of 0.50m hcl to reach the equivalence point? ka
The pH at the equivalence point will be 4.028
Volume of NaOCl = 20.00 ml
Volume of HCl = 28.30 ml
Molarity of HCl = 0.50 M
Ka = 3.0 × 10⁻⁸ (missing in question)
pH of solution at eq. point = ?
Write the chemical equation
NaOCl + HCl → HOCl + NaCl
Initial concentration of reactants and products are as:
NaOCl = 20 × M
HCl = 28.3 × 0.50
HOCl = 0
NaCl = 0
Equivalence point concentration of reactants and products are as:
NaOCl = 0
HCl = 0
HOCl = 28.3 × 0.5
NaCl = 28.3 × 0.5
As NaCl is a neutral salt so we take the concentration of HOCl
[HOCl] = 28.3 ml × 0.5 M / 48.3 ml (total volume)
[HOCl] = 0.2929 M
Now calculate the pH
pH = 1/2 [pKa - log C]
pH = 1/2 [ (8 - log 3) - log 0.2929]
pH = 4.028
You can also learn about equivalence point from the following question:
https://brainly.com/question/14782315
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What would happen to the carbon dioxide and water if you decreased the amount of oxygen?
Answer:
What happens when carbon dioxide increases and oxygen decreases? Increasing carbon dioxide and decreasing oxygen make it harder for deep-sea animals to ‘breathe’ About one third of the carbon dioxide that humans produce by burning fossil fuels is being absorbed by the world’s oceans, gradually causing seawater to become more acidic.
Explanation:
Hope this helps