Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 8 - Equilibria>EXAM-STYLE QUESTIONS>Q 5

EASY

AS and A Level

IMPORTANT

Earn 100

Explain the effect on $K_{c}$ of an increase in temperature.

Important Questions on Equilibria

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 8 - Equilibria>EXAM-STYLE QUESTIONS>Q 7

When dissolved in an organic solvent, hydrogen chloride reacts with hydrogen iodide as follows: $HCl + HI ⇌ H_{2} {Cl}^{+} + I^{-}$ . Use the Bronsted-Lowry theory of acids and bases to explain which reactant is the acid, and which reactant is the base.

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 8 - Equilibria>EXAM-STYLE QUESTIONS>Q 10

Sketch the graph of

pH

that would be obtained when

10.0 {cm}^{3}

of

0.200 mol {dm}^{- 3} HCl

is titrated against

0.200 mol {dm}^{- 3}

aqueous ammonia.

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 8 - Equilibria>EXAM-STYLE QUESTIONS>Q 10

Explain why methyl orange is a suitable indicator for strong acid-weak base titration but phenolphthalein is not.

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 8 - Equilibria>EXAM-STYLE QUESTIONS>Q 10

Sketch the graph that would be obtained if

25.0 {cm}^{3}

of

0.200 mol {dm}^{- 3}

sodium hydroxide is titrated against

0.100 mol {dm}^{- 3}

ethanoic acid solution.

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 8 - Equilibria>EXAM-STYLE QUESTIONS>Q 10

Explain why phenolphthalein is a suitable indicator for weak acid and strong base titration but methyl orange is not.

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 8 - Equilibria>EXAM-STYLE QUESTIONS>Q 10

Bromocresol green and bromothymol blue are indicators. Bromocresol green has a

pH

range of

3.8

to

5.4

and bromothymol blue has a

pH

range of

6

to

7.6

. Would either of these indicators be suitable for the titration in part

a

or the titration in part

c

? Explain your answer.