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Chemistry Part-I

Equilibrium

Determine the degree of ionization and {pH} of a 0.05 {M} of a

Chemistry Part-I

Class 11

NCERT

Chapter 1: Some Basic Concepts of Chemistry

44 questions

Chapter 2: Structure of Atom

85 questions

Chapter 3: Classification of Elements and Periodicity in Properties

50 questions

Chapter 4: Chemical Bonding and Molecular Structure

44 questions

Chapter 5: States of Matter

28 questions

Chapter 6: Thermodynamics and Thermochemistry

36 questions

Chapter 7: Equilibrium

101 questions

Calculate the

pH

of the solution in which

0.2 M NH_{4} Cl

and

0.1 M NH_{3}

are present. The

pK_{b}

of ammonia solution is

4.75

Determine the degree of ionization and

pH

of a

0.05 M

of ammonia solution. The ionization constant of ammonia can be taken from Table 7.7. Also, calculate the ionization constant of the conjugate acid of ammonia.

Calculate the

pH

of a

0.10 M

ammonia solution. Calculate the

pH

after

50.0 mL

of this solution is treated with

25.0 mL

0.10 M HCl

. The dissociation constant of ammonia,

K_{b} = 1.77 \times 1 0^{- 5}

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Question

Medium

Solving time: 3 mins

Determine the degree of ionization and $pH$ of a $0.05 M$ of ammonia solution. The ionization constant of ammonia can be taken from Table 7.7. Also, calculate the ionization constant of the conjugate acid of ammonia.

Name: Video solution 1: [Solved] Determine the degree of ionization and pH of a 0.05M of ammonia solution. The ionization constant of ammonia can be taken from Table 7.7. Also, calculate the ionization constant of the conjugate acid of ammonia. - Chemistry Part-I
Uploaded: 2023-04-20T02:32:18.000Z
Duration: 10 min
Description: Video solution 1: [Solved] Determine the degree of ionization and pH of a 0.05M of ammonia solution. The ionization constant of ammonia can be taken from Table 7.7. Also, calculate the ionization constant of the conjugate acid of ammonia. - Chemistry Part-I

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Updated on: Apr 20, 2023

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Chemistry Part-I (NCERT)

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Determine the degree of ionization and

pH

of a

0.05 M

of ammonia solution. The ionization constant of ammonia can be taken from Table 7.7. Also, calculate the ionization constant of the conjugate acid of ammonia.

13 mins ago

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13 mins ago

Text solutionVerified

Solution
The ionization of

NH_{3}

in water is represented by equation:

NH_{3} + H_{2} O ⇌ NH_{4}^{+} + OH^{-}

We use equation (7.33) to calculate hydroxyl ion concentration,

[O H^{-}] = c α = 0.05 α

K_{b} = 0.05 α^{2} / (1 - α)

The value of

α

is small, therefore the quadratic equation can be simplified by neglecting

α

in comparison to 1 in the denominator on right hand side of the equation,
Thus,

K_{b} = c α^{2}

α = (1.77 \times 1 0^{- 5} /0.05)

= 0.018

[OH] = c α = 0.05 \times 0.018 = 9.4 \times 1 0^{- 4} M

[H^{+}] = K_{w} / [OH] = 1 0^{- 14} / (9.4 \times 1 0^{- 4})

= 1.06 \times 1 0^{- 11}

pH = - lo g (1.06 \times 1 0^{- 11}) = 10.97

K_{a} \times K_{b} = K_{w}

K_{a} = K_{w} / K_{b} = 1 0^{- 14} /1.77 \times 1 0^{- 5}

= 5.64 \times 1 0^{- 10}

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Practice more questions from Chemistry Part-I (NCERT)

Calculate the

pH

of the solution in which

0.2 M NH_{4} Cl

and

0.1 M NH_{3}

are present. The

pK_{b}

of ammonia solution is

4.75

Determine the degree of ionization and

pH

of a

0.05 M

of ammonia solution. The ionization constant of ammonia can be taken from Table 7.7. Also, calculate the ionization constant of the conjugate acid of ammonia.

Calculate the

pH

of a

0.10 M

ammonia solution. Calculate the

pH

after

50.0 mL

of this solution is treated with

25.0 mL

0.10 M HCl

. The dissociation constant of ammonia,

K_{b} = 1.77 \times 1 0^{- 5}

View all

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Question Text	Determine the degree of ionization and $pH$ of a $0.05 M$ of ammonia solution. The ionization constant of ammonia can be taken from Table 7.7. Also, calculate the ionization constant of the conjugate acid of ammonia.
Updated On	Apr 20, 2023
Topic	Equilibrium
Subject	Chemistry
Class	Class 11
Answer Type	Text solution:1 Video solution: 1
Upvotes	236
Avg. Video Duration	10 min

Determine the degree of ionization and $pH$ of a $0.05 M$ of ammonia solution. The ionization constant of ammonia can be taken from Table 7.7. Also, calculate the ionization constant of the conjugate acid of ammonia.

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Determine the degree of ionization and pH of a 0.05M of ammonia solution. The ionization constant of ammonia can be taken from Table 7.7. Also, calculate the ionization constant of the conjugate acid of ammonia.

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Determine the degree of ionization and $pH$ of a $0.05 M$ of ammonia solution. The ionization constant of ammonia can be taken from Table 7.7. Also, calculate the ionization constant of the conjugate acid of ammonia.