The hydroxide ion concentration of a solution is 1 × 10 - 8 M . What is the pH of the solution?

The concentration of one mole of hydroxide ions is 1 × 10 - 11 M The hydroxide ion concentration [ OH - ] = 1 . 0 × 10 - 8 M pOH = - log [ OH - ] = log 1 . 0 × 10 - 8 pH + pOH = 14 pH = 14 - p OH = 14 - 8 = 6 Hence, the pH of the solution is 6 .

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An analyst wants to convert $1 L HCl$ of $pH = 1$ to a solution of $HCl$ of $pH = 2$ . The volume of water needed to do this dilution is _____ $mL$ . (Nearest integer)

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Important Questions on Equilibrium

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

The solution having highest

pH

EASY

Chemistry>Physical Chemistry>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>Equilibrium>pH Scale

The

pH

of an aqueous solution of

10^{- 8} MHCl

HARD

Chemistry>Physical Chemistry>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]

MEDIUM

Chemistry>Physical Chemistry>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>Equilibrium>pH Scale

The hydroxyl ion concentration in a solution having

pH

value

3

will be

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

The number of

H^{+}

ions present in

1 mL

of a solution whose

pH

13

HARD

Chemistry>Physical Chemistry>Equilibrium>pH Scale

The hydroxide ion concentration of a solution is

1 \times 10^{- 8} M

. What is the pH of the solution?

MEDIUM

Chemistry>Physical Chemistry>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?

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

100 mL

0.1 M HCl

is taken in a beaker and to it

100 mL

0.1 M NaOH

of is added in steps of

2 mL

and the

pH

is continuously measured. Which of the following graphs correctly depicts the change in

pH

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Calculate the

pOH

0.10 MHCl

solution.

HARD

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Two solutions,

A

and

B,

each of

100 L

was made by dissolving

4 g

N a O H

and

9.8 g

H_{2} S O_{4}

in water, respectively. The

p H

of the resultant solution obtained from mixing

40 L

of solution

A

and

10 L

of solution

B

is ____________.

(\log 2 = 0.3)

MEDIUM

Chemistry>Physical Chemistry>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}

]

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>pH Scale

An acid solution of

pH = 6

is diluted

1000

times. The

pH

of the final solution becomes

EASY

Chemistry>Physical Chemistry>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>Equilibrium>pH Scale

The hydrogen ion concentration of a solution with

pH

value

3.69

is given by

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>pH Scale

The

pH

of a solution increase from

1

2

. The concentration of

H^{+}

ion

MEDIUM

Chemistry>Physical Chemistry>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}

)

HARD

Chemistry>Physical Chemistry>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:

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

The pH of 1N aqueous solutions of

HCl, {CH}_{3} COOH

and

HCOOH

follows the order

An analyst wants to convert 1 L HCl of pH=1 to a solution of HCl of pH=2. The volume of water needed to do this dilution is _____ mL. (Nearest integer)

Important Questions on Equilibrium

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An analyst wants to convert $1 L HCl$ of $pH = 1$ to a solution of $HCl$ of $pH = 2$ . The volume of water needed to do this dilution is _____ $mL$ . (Nearest integer)