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IB Chemistry: Proton transfer reactions — Practice Questions & Answers

572 practice questions available for this topic — here are 10 with full answers and explanations.

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Practice questions with answers

1 Multiple choice · Easy

A Bronsted-Lowry acid is defined as a:

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WhyA Bronsted-Lowry acid is a proton ($\text{H}^{+}$) donor; a base is a proton acceptor.
2 Multiple choice · Easy

What is the pH of a neutral aqueous solution at $25\,^{\circ}\text{C}$?

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WhyAt $25\,^{\circ}\text{C}$ a neutral solution has $[\text{H}^{+}] = [\text{OH}^{-}] = 1\times 10^{-7}\,\text{mol dm}^{-3}$, giving pH 7.
3 Multiple choice · Medium

What is the conjugate base of $\text{HCl}$?

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WhyWhen $\text{HCl}$ donates a proton it forms its conjugate base, $\text{Cl}^{-}$.
4 Multiple choice · Medium

What are the products when an acid reacts with a metal carbonate?

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WhyAcid + carbonate gives a salt, water and carbon dioxide, e.g. $2\text{HCl} + \text{CaCO}_{3} \rightarrow \text{CaCl}_{2} + \text{H}_{2}\text{O} + \text{CO}_{2}$.
5 Multiple choice · Medium

What is the pH of a $0.010\,\text{mol dm}^{-3}$ solution of the strong acid $\text{HCl}$?

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Why$\text{HCl}$ is fully dissociated, so $[\text{H}^{+}] = 0.010 = 1\times 10^{-2}$ and $\text{pH} = -\log(1\times 10^{-2}) = 2$.
6 Multiple choice · Hard

What distinguishes a strong acid from a weak acid in aqueous solution?

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WhyA strong acid is fully (almost completely) dissociated into ions in water, whereas a weak acid only partially dissociates.
7 Fill in the blank · Easy

In the Bronsted-Lowry theory, a base is a substance that accepts a .

Answer: proton / H+ / hydrogen ion

WhyA Bronsted-Lowry base accepts a proton ($\text{H}^{+}$).
8 Fill in the blank · Medium

The pH of a $0.0010\,\text{mol dm}^{-3}$ solution of the strong acid $\text{HCl}$ is .

Answer: 3 / 3.0

Why$[\text{H}^{+}] = 1\times 10^{-3}$, so $\text{pH} = -\log(1\times 10^{-3}) = 3$.
9 Multiple choice · Medium

Calcium carbonate reacts with dilute hydrochloric acid. Which equation correctly represents this reaction?

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WhyCarbonate + acid produces a salt, water and carbon dioxide.
10 Multiple choice · Easy

A carbonate reacting with an acid is an example of which type of reaction?

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WhyIt is an acid-base (neutralisation) reaction producing a salt, water and carbon dioxide.

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Practise other IB Chemistry topics

Topic S1.1 (SL/HL): Introduction to the particulate nature of matter Topic S1.2 (SL/HL): The nuclear atom Topic S1.2 (HL): The nuclear atom Topic S1.3 (SL/HL): Electron configurations Topic S1.3 (HL): Electron configurations Topic S1.4 (SL/HL): Counting particles by mass: the mole Topic S1.5 (SL/HL): Ideal gases Topic S2.1 (SL/HL): The ionic model Topic S2.1 (HL): The ionic model Topic S2.2 (SL/HL): The covalent model Topic S2.2 (HL): The covalent model Topic S2.3 (SL/HL): The metallic model Topic S2.3 (HL): The metallic model Topic S2.4 (SL/HL): From models to materials Topic S2.4 (HL): From models to materials Topic S3.1 (SL/HL): The periodic table: classification of elements Topic S3.1 (HL): The periodic table: classification of elements Topic S3.2 (SL/HL): Functional groups: classification of organic compounds Topic S3.2 (HL): Functional groups: classification of organic compounds Topic R1.1 (SL/HL): Measuring enthalpy changes Topic R1.2 (SL/HL): Energy cycles in reactions Topic R1.2 (HL): Energy cycles in reactions Topic R1.3 (SL/HL): Energy from fuels Topic R1.4 (HL): Entropy and spontaneity Topic R2.1 (SL/HL): How much? The amount of chemical change Topic R2.2 (SL/HL): How fast? The rate of chemical change Topic R2.2 (HL): How fast? The rate of chemical change Topic R2.3 (SL/HL): How far? The extent of chemical change Topic R2.3 (HL): How far? The extent of chemical change Topic R3.1 (HL): Proton transfer reactions Topic R3.2 (SL/HL): Electron transfer reactions Topic R3.2 (HL): Electron transfer reactions Topic R3.3 (SL/HL): Electron sharing reactions Topic R3.4 (SL/HL): Electron-pair sharing reactions Topic R3.4 (HL): Electron-pair sharing reactions