EASY

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At $90 ° C$ , pure water has $[H_{3} O^{+}] = 10^{- 6} m o l L^{- 1}$ . What is the value of $K_{w}$ at $90 ° C$ -

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Important Questions on Equilibrium

EASY

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

The number of

H^{+}

ions present in

1 mL

of a solution whose

pH

13

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

How many litres of water must be added to

1

litre of aqueous solution of

HCl

with a pH of

1

to create an aqueous solution with pH of

2

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

The

pH

of an aqueous solution of

10^{- 8} MHCl

EASY

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

The

pH

of pure water at

80 ° C

HARD

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

For the following Assertion and Reason, the correct option is:
Assertion: The

p H

of water increases with increase in temperature.
Reason: The dissociation of water into

H^{+}

and

O H^{-}

is an exothermic reaction.

EASY

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

The

pH

of pure water at

90 {}^{\circ}C

will be

HARD

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

298 K,

the ratio of dissociated water to that of undissociated water is [Assume pure water]

EASY

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

Which of the following equations give ionic product of water?

(i) ${NH}_{3 (aq)} + H_{2} O ⇆ {NH}_{4 (aq)}^{+} + {OH}_{(aq)}^{-}$

(ii) ${NH}_{4 (aq)}^{+} + H_{2} O ⇆ H_{3} O^{+} + {NH}_{3 (aq)}$

(iii) ${NH}_{2 (aq)}^{-} + H_{2} O ⇆ {NH}_{3 (aq)} + {OH}^{-}$

(iv) ${NH}_{3 (aq)} + {OH}_{(aq)}^{-} ⇆ {NH}_{2 (aq)}^{-} + H_{2} O$

EASY

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

Which one of the following statements does not define the characteristic property of water- "Water is a universal solvent" ?

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

Equal volumes of three strong acid solutions of

p H 3, 4

and

5

are mixed in a vessel. What will be the

H^{+}

ion concentration in the mixture?

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

At what molar concentration of HCl will its aqueous solution have an [H⁺] to which equal contribution come from HCl and H₂O at 90^oC.

[K_w of H₂O = 10^-12 M² at 90^oC]

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

The value of

{pK}_{w}

of water:

EASY

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

K_{a} = 10^{- 5}

for a weak acid, then

{p K}_{b}

for its conjugate base would be -

EASY

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

By applying the law of mass action, the equilibrium constant,

K

for the reaction

HA + H_{2} O ⇌ H_{3} O^{+} + A^{-}

, is given as

EASY

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

What is the [OH^–] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 M Ba(OH)₂ ?

EASY

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

The value of

{pK}_{w}

of water

EASY

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

An aqueous solution in which the

H^{+}

ion concentration is greater than

10^{- 7}

M is said to be

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

At a certain temperature, pure water has hydronium ion concentration equal to

10^{- 6.5} m o l e

L^{- 1}

. The value of

K_{w}

at this temperature will be -

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

80 ° C,

distilled water has

H_{3} O^{+}

concentration equal to

1 \times 10^{- 6} mol / L

. The value of

K_{w}

at this temperature will be :-

EASY

Chemistry>Physical Chemistry>Equilibrium>Ionic Product of Water

For pure water at

25^{o} C

and

50^{o} C

, the correct statement is

At 90° C, pure water has H3O+=10–6 mol L–1. What is the value of Kw at 90° C -

Important Questions on Equilibrium

Learn and Prepare for any exam you want !

At $90 ° C$ , pure water has $[H_{3} O^{+}] = 10^{- 6} m o l L^{- 1}$ . What is the value of $K_{w}$ at $90 ° C$ -