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Leokris [45]
2 years ago
6

Which of the following

Chemistry
1 answer:
Leokris [45]2 years ago
7 0

A. Acids and bases don't react with each other.  --> False.  Acids and bases react in reactions called neutralization reactions, whose products are salt and water.

B. Acids mixed with bases neutralize each other.  --> True.  See above.

C. Acids mixed with bases make stronger bases.  --> False.  Acids and bases react to neutralize each other, so they would weaken each other, not result in a stronger base or a stronger acid.

D. Acids mixed with bases make stronger acids.  --> False.  See above.

<h3>Answer:</h3>

B. Acids mixed with bases neutralize each other

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Calculate the acid dissociation constant Ka of a 0.2 M solution of weak acid that is 0.1% ionized is ________.
mars1129 [50]

Answer: acid dissociation constant Ka= 2.00×10^-7

Explanation:

For the reaction

HA + H20. ----> H3O+ A-

Initially: C. 0. 0

After : C-Cx. Cx. Cx

Ka= [H3O+][A-]/[HA]

Ka= Cx × Cx/C-Cx

Ka= C²X²/C(1-x)

Ka= Cx²/1-x

Where x is degree of dissociation = 0.1% = 0.001 and c is the concentration =0.2

Ka= 0.2(0.001²)/(1-0.001)

Ka= 2.00×10^-7

Therefore the dissociation constant is

2.00×10^-7

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3 years ago
At equilibrium the reactant and product concentrations are constant because a change in one direction is balanced by a change in
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Answer: a. The concentrations of the reactants and products have reached constant values

Explanation:

The reactions which do not go on completion and in which the reactant forms product and the products goes back to the reactants simultaneously are known as equilibrium reactions.  For a chemical equilibrium reaction, equilibrium state is achieved when the rate of forward reaction becomes equal to rate of the backward reaction.

Equilibrium state is the state when reactants and products are present but the concentrations does not change with time and are constant.

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as K_{eq}

K is the constant of a certain reaction when it is in equilibrium, while Q is the quotient of activities of products and reactants at any stage other than equilibrium of a reaction.

For a equilibrium reaction,

A\rightleftharpoons B

K_{eq}=\frac{[B]}{[A]}

Thus the correct answer is the concentrations of the reactants and products have reached constant values.

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