Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 21 - Further Aspects of Equilibria>EXAM-STYLE QUESTIONS>Q 2

EASY

AS and A Level

IMPORTANT

Earn 100

How many moles of sodium ethanoate must be added $2.00 {dm}^{3}$ of $0.0100 mol {dm}^{- 3}$ ethanoic acid to produce a buffer solution $pH 5.40$ ? $(K_{a} of ethanoic acid = 1.74 \times 10^{- 5} mol {dm}^{- 3})$

Important Questions on Further Aspects of Equilibria

MEDIUM

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 21 - Further Aspects of Equilibria>EXAM-STYLE QUESTIONS>Q 2

Explain why the

pH

of a solution containing

0.100 mol {dm}^{- 3}

ethanoic acid and

0.100 mol {dm}^{- 3}

sodium ethanoate does not change significantly when a small amount of hydrochloric acid is added.

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 21 - Further Aspects of Equilibria>EXAM-STYLE QUESTIONS>Q 6

Deduce the pH of

0.25 mol {dm}^{- 3} HCl (aq)

.

MEDIUM

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 21 - Further Aspects of Equilibria>EXAM-STYLE QUESTIONS>Q 6

Deduce the pH of

0.0500 mol {dm}^{- 3}

sodium hydroxide.

(K_{w} = 1.00 x 10^{- 14} mol {dm}^{- 3})

MEDIUM

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 21 - Further Aspects of Equilibria>EXAM-STYLE QUESTIONS>Q 6

Propanoic acid is a weak acid. A

0.0500 mol {dm}^{- 3}

solution of propanoic acid has a

pH

of

3.1

. Calculate the value of

K_{a}

, for propanoic acid. Show all your working.