Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 92

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The hydrolysis constant of $0.5 M$ ammonium benzoate is $6.25 \times 10^{- 6} .$ The percentage hydrolysis of the salt is:

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Important Questions on Equilibrium

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 93

When

{CO}_{2}

dissolves in water, the following equilibrium is established -

{CO}_{2} + 2 H_{2} O ⇌ H_{3} O^{+} + {HCO}_{3}^{1 -}

If the equilibrium constant for the reaction is

3.8 \times 10^{- 7}

and

pH = 6,

the ratio

\frac{[{HCO}_{3}^{-}]}{[{CO}_{2}]}

will be:

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 95

The strongest Bronsted base among the following compounds is:-

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 96

The ionization of benzoic acid is represented by the equation:

C_{6} H_{5} COOH (aq) ⇌ H^{+} (aq) + C_{6} H_{5} {COO}^{-} (aq)

If a

0.045 M

solution of benzoic acid has

[H^{+}] = 1.7 \times 10^{- 3} M,

and then, the

K_{a}

of benzoic acid is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 97

If the

K_{sp}

of

{CaF}_{2}

at

25 ° C

is

1.6 \times 10^{- 10}

, then the number of moles of the salt must be dissolved in

2.0 L

of water at

25 ° C

to form a saturated solution is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 98

A solution of

0.10 M

NaZ

has

pH = 8.90 .

The

K_{a}

of

HZ

is :

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 99

The

pH

of a solution made of mixing

200 mL

of

0.0657 M NaOH, 140 mL

of

0.107 M HCl

and

150 mL

of water would be:

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 100

The molarity of

{NH}_{3}

solution of

pH 12.0 at 25 ° C

is:

(K_{b}

of

{NH}_{3}

at

25 ° C

is

1.8 \times 10^{- 5})

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 101

A week acid,

HA,

has a

K_{a}

of

1.00 \times 10^{- 5}

. If

0.100 mole

of this acid is dissolving in

1 L

of water, the percentage of acid dissociated at equilibrium is closed to