The concentration of hydrogen ion in a sample of soft drink is 3.8 × 10 - 3 M . what is its p H ?

H + = 3.8 × 10 - 3 ∴ pH value of soft drink = - log ⁡ H + = - log ⁡ ( 3.8 × 10 - 3 ) ( ∴ logm × n = logm + logn ) = - l o g 3 . 8 + 3 l o g 10 ( ∴ logm n = nlogm ) = - 0.58 + 3 = 2.42

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The pH value of $1 N$ solution of a strong acid is zero, so if the concentrations will be $2 N, 3 N, 10 N$ etc, then the pH value will be .

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Important Questions on Ionic Equilibrium

MEDIUM

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

What is the pH of the resulting solution when equal volumes of

0.1

M NaOH and

0.01

M HCl are mixed?

MEDIUM

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

p^{H}

value of

0.001 MNaOH

solution is

MEDIUM

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

Following solutions were prepared by mixing different volumes of

NaOH

and

HCl

of different concentrations.

(i)

60 mL \frac{M}{10} HCl + 40 mL \frac{M}{10} NaOH

(ii)

55 mL \frac{M}{10} HCl + 45 mL \frac{M}{10} NaOH

(iii)

75 mL \frac{M}{5} HCl + 25 mL \frac{M}{5} NaOH

(iv)

100 mL \frac{M}{10} HCl + 100 mL \frac{M}{10} NaOH

The

pH

of which one of them will be equal to

1

MEDIUM

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

A soft drink was bottled with a partial pressure of

{CO}_{2}

of 3 bar over the liquid at room temperature. The partial pressure of

{CO}_{2}

over the solution approaches a value of 30 bar when

44 g

{CO}_{2}

is dissolved in

1 kg

of water at room temperature. The approximate

pH

of the soft drink is ___________

\times 10^{- 1}

.
(First dissociation constant of

H_{2} {CO}_{3} = 4.0 \times 10^{- 7}; \log 2 = 0.3;

density of the soft drink

= 1 g {mL}^{- 1}

)

EASY

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

The solution having highest

pH

MEDIUM

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

The

pH

of the resultant solution obtained by mixing

20 mL

0.01 M HCl

and

20 mL

0.005 M Ca (OH)_{2}

is;

MEDIUM

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

200 mL

0.01 MHCl

is mixed with

400 mL

0.01 {MH}_{2} {SO}_{4}

. The

pH

of the mixture is

EASY

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

Two solutions $A$ and $B$ have $pH$ $3$ and $6$ respectively. Which of the following statement is correct ?

MEDIUM

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

An acid solution of

pH = 6

is diluted

1000

times. The

pH

of the final solution becomes

MEDIUM

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

The hydroxyl ion concentration in a solution having

pH

value

3

will be

EASY

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

Calculate the

pOH

0.10 MHCl

solution.

EASY

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

Arrange the following solutions in the decreasing order of pOH :
(A)

0.01 MHCl

(B)

0.01 MNaOH

(C)

0.01 {MCH}_{3} COONa

(D)

0.01 MNaCl

MEDIUM

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

A solution is prepared by dissolving

2 g

NaOH

in one litre water. Find the

pH

of this solution, assuming complete ionization. [

K_{w}

for water

= 1 \times 10^{- 14}

]

EASY

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

The pH of 1N aqueous solutions of

HCl, {CH}_{3} COOH

and

HCOOH

follows the order

HARD

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

The

pH

of a solution obtained by mixing

50 mL

1 M HCl

and

30 mL

1 M NaOH

x \times 10^{- 4} .

The value of

x

is (Nearest integer)

[\log 2.5 = 0.3979]

EASY

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

The number of

H^{+}

ions present in

1 mL

of a solution whose

pH

13

HARD

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

Consider the following statements

(a)

The pH of a mixture containing

400 m L

0.1 M H_{2} S O_{4}

and

400 m L

0.1 M N a O H

will be approximately

1.3 .

(b)

Ionic product of water is temperature dependent.

(c)

A monobasic acid with

K_{a} = 10^{- 5}

has a

p H = 5

. The degree of dissociation of this acid is

50 %

(d)

The Le Chatelier's principle is not applicable to common-ion effect.
The correct statements are:

MEDIUM

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

The concentration of hydrogen ion in a sample of soft drink is

3.8 \times 10^{- 3} M

. what is its

p H

MEDIUM

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

What is the $pH$ of $0.001 M$ aniline solution ? The ionisation constant of aniline is $4.27 \times 10^{- 10}$ .

Round off your answer to the nearest integer.

HARD

Chemistry>Physical Chemistry>Ionic Equilibrium>pH Scale

Assuming complete dissociation, calculate the

p H

of the following solutions:

(A)

0.003 M H C l

(B)

0.005 M N a O H

(C)

0.002 M H Br

(D)

0.002 M K O H

The pH value of 1 N solution of a strong acid is zero, so if the concentrations will be 2N, 3N, 10 N etc, then the pH value will be .

Important Questions on Ionic Equilibrium

Learn and Prepare for any exam you want !

The pH value of $1 N$ solution of a strong acid is zero, so if the concentrations will be $2 N, 3 N, 10 N$ etc, then the pH value will be .