Pradeep's Chemistry Vol 1>Chapter 9 - Ionic Equilibrium in Solution>ADDITIONAL QUESTIONS>Q 16

MEDIUM

11th CBSE

IMPORTANT

Earn 100

What do you understand by ‘ $pH$ scale’? Can a solution have $pH$ less than $0$ or more than $14$ ? Explain your answer, giving suitable reasons.

Important Questions on Ionic Equilibrium in Solution

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 9 - Ionic Equilibrium in Solution>ADDITIONAL QUESTIONS>Q 17

Derive expression for the calculation of

pH

of a solution of a salt of weak acid with a strong base.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 9 - Ionic Equilibrium in Solution>ADDITIONAL QUESTIONS>Q 17

Derive expression for the calculation of

pH

of a solution of a salt of weak base with a strong acid.

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 9 - Ionic Equilibrium in Solution>ADDITIONAL QUESTIONS>Q 18

Prove that the degree of hydrolysis of the solution of a salt of a weak acid with a weak base (e.g.

{CH}_{3} {COONH}_{4}

) is independent of the concentration of solution.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 9 - Ionic Equilibrium in Solution>ADDITIONAL QUESTIONS>Q 19

Derive that for the solution of a salt of strong acid with a weak base (having concentration =

c {molL}^{- 1}

),

p H = - \frac{1}{2} [\log K_{w} - \log K_{b} + logc]

.

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 9 - Ionic Equilibrium in Solution>ADDITIONAL QUESTIONS>Q 20

Briefly explain why phenolphthalein is not a suitable indicator when the base is weak and why methyl orange is not suitable when the acid is weak.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 9 - Ionic Equilibrium in Solution>ADDITIONAL QUESTIONS>Q 21

Is

pH

of the end point of acid-base titration always equal to

7

? Explain why or why not.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 9 - Ionic Equilibrium in Solution>ADDITIONAL QUESTIONS>Q 22

Prove that for the colour change

p K_{indicator} = p H

at the equivalence point.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 9 - Ionic Equilibrium in Solution>ADDITIONAL QUESTIONS>Q 23

Why most of the indicators have a useful colour change over a

pH

range of

2

units? Prove mathematically.