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R3.1 Proton transfer reactions - IB Questionbank | RevisionDojo

Practice R3.1 Proton transfer reactions with authentic IB Chemistry exam questions for both SL and HL students. This question bank mirrors Paper 1A, 1B, 2 structure, covering key topics like atomic structure, chemical reactions, and organic chemistry. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of IB examiners.

Paper

Level

Question 1

HLPaper 1A

Which of the following species can act as an amphiprotic substance?

Question 2

SL & HLPaper 1A

Which salt will produce the most acidic solution when dissolved in water?

Question 3

HLPaper 1A

The acid-base indicator phenol red, $\text{HIn}$ , changes colour from yellow to red over a pH range of $6.6$ -- $8.2$ . Which statement is correct?

Question 4

HLPaper 1A

Which combination of acid and base is most likely to have a pH of 8.5 at the equivalence point in a titration?

Question 5

SLPaper 1A

Which statement is correct?

Question 6

HLPaper 1A

Which is a conjugate Brønsted-Lowry acid-base pair?

$\text{CH}_3\text{COOH(aq)} + \text{H}_2\text{O(l)} \rightleftharpoons \text{CH}_3\text{COO}^-(\text{aq}) + \text{H}_3\text{O}^+(\text{aq})$

Question 7

HLPaper 1A

What is the order of increasing acidity of the following acids?

Acid	$K_a$
chloroethanoic	$1.3 \times 10^{-3}$
ethanoic	$1.7 \times 10^{-5}$

Acid	$pK_a$
hydrogen fluoride	3.3
hydrogen cyanide	9.3

Question 8

SLPaper 1A

Which ions are present in an aqueous solution of $\mathrm{K_2CO_3}$ ?

I. $\mathrm{HCO_3^-}$

II. $\mathrm{OH^-}$

III. $\mathrm{CO_3^{2-}}$

Question 9

SLPaper 1A

What is the order of increasing pH for the following solutions of the same concentration?

Question 10

SLPaper 1A

Which statement is correct for a weak acid?

Paper

Level

Question 1

HLPaper 1A

Which of the following species can act as an amphiprotic substance?

Question 2

SL & HLPaper 1A

Which salt will produce the most acidic solution when dissolved in water?

Question 3

HLPaper 1A

The acid-base indicator phenol red, $\text{HIn}$ , changes colour from yellow to red over a pH range of $6.6$ -- $8.2$ . Which statement is correct?

Question 4

HLPaper 1A

Which combination of acid and base is most likely to have a pH of 8.5 at the equivalence point in a titration?

Question 5

SLPaper 1A

Which statement is correct?

Question 6

HLPaper 1A

Which is a conjugate Brønsted-Lowry acid-base pair?

$\text{CH}_3\text{COOH(aq)} + \text{H}_2\text{O(l)} \rightleftharpoons \text{CH}_3\text{COO}^-(\text{aq}) + \text{H}_3\text{O}^+(\text{aq})$

Question 7

HLPaper 1A

What is the order of increasing acidity of the following acids?

Acid	$K_a$
chloroethanoic	$1.3 \times 10^{-3}$
ethanoic	$1.7 \times 10^{-5}$

Acid	$pK_a$
hydrogen fluoride	3.3
hydrogen cyanide	9.3

Question 8

SLPaper 1A

Which ions are present in an aqueous solution of $\mathrm{K_2CO_3}$ ?

I. $\mathrm{HCO_3^-}$

II. $\mathrm{OH^-}$

III. $\mathrm{CO_3^{2-}}$

Question 9

SLPaper 1A

What is the order of increasing pH for the following solutions of the same concentration?

Question 10

SLPaper 1A

Which statement is correct for a weak acid?

Paper

Level

Question 1

HLPaper 1A

Which of the following species can act as an amphiprotic substance?

Question 2

SL & HLPaper 1A

Which salt will produce the most acidic solution when dissolved in water?

Question 3

HLPaper 1A

The acid-base indicator phenol red, $\text{HIn}$ , changes colour from yellow to red over a pH range of $6.6$ -- $8.2$ . Which statement is correct?

Question 4

HLPaper 1A

Which combination of acid and base is most likely to have a pH of 8.5 at the equivalence point in a titration?

Question 5

SLPaper 1A

Which statement is correct?

Question 6

HLPaper 1A

Which is a conjugate Brønsted-Lowry acid-base pair?

$\text{CH}_3\text{COOH(aq)} + \text{H}_2\text{O(l)} \rightleftharpoons \text{CH}_3\text{COO}^-(\text{aq}) + \text{H}_3\text{O}^+(\text{aq})$

Question 7

HLPaper 1A

What is the order of increasing acidity of the following acids?

Acid	$K_a$
chloroethanoic	$1.3 \times 10^{-3}$
ethanoic	$1.7 \times 10^{-5}$

Acid	$pK_a$
hydrogen fluoride	3.3
hydrogen cyanide	9.3

Question 8

SLPaper 1A

Which ions are present in an aqueous solution of $\mathrm{K_2CO_3}$ ?

I. $\mathrm{HCO_3^-}$

II. $\mathrm{OH^-}$

III. $\mathrm{CO_3^{2-}}$

Question 9

SLPaper 1A

What is the order of increasing pH for the following solutions of the same concentration?

Question 10

SLPaper 1A

Which statement is correct for a weak acid?

R3.1 Proton transfer reactions Questionbank