Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Acids, Bases and Salt Preparations
156 practice questions
Topics covered
- Reactions of acids18 practice questions
- Reacting acids with bases19 practice questions
- Reacting acids with carbonates19 practice questions
- Salt preparations19 practice questions
- Making soluble salts (except sodium, potassium and ammonium salts)19 practice questions
- Making sodium, potassium and ammonium salts18 practice questions
- Making insoluble salts19 practice questions
- Theories of acids and bases19 practice questions
Practice questions
61–66 of 66 · Normal
Question 61
4 marks · Normal
Answer and see the solution →The table below shows five example reactions. For each reaction, state which theory (Arrhenius, Bronsted-Lowry, or both) can be used to explain it, and give a reason for your choice.
Acid-base reactions for theory comparison Equation Theory (Arrhenius / Bronsted-Lowry / Both) Reason HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) HCl(g) + NH3(g) → NH4Cl(s) HNO3(aq) + NH3(aq) → NH4NO3(aq) H2O(l) + NH3(g) → NH4^+(aq) + OH^-(aq) NH4^+(aq) + OH^-(aq) → NH3(aq) + H2O(l) Question 62
1 mark · Normal
Answer and check →According to the Bronsted-Lowry theory, what is a base?
- A.A substance that donates a proton.
- B.A substance that accepts a proton.
- C.A substance that donates electrons.
- D.A substance that accepts electrons.
Question 63
2 marks · Normal
Answer and see the solution →Use the Bronsted-Lowry definition to identify the acid and base in the following reaction: \[ H_2SO_4(aq) + CuO(s) \rightarrow CuSO_4(aq) + H_2O(l) \] State which is the acid and which is the base.
Question 64
4 marks · Normal
Answer and see the solution →The hydroxonium ion, H_3O^+, plays a key role in acidbase reactions.
(a)[2 marks]Draw a dot-and-cross diagram to show the bonding in a hydroxonium ion, H_3O^+.
(b)[2 marks]Explain, in terms of proton transfer, how H_3O^+ is formed from HCl and H_2O.
Question 65
6 marks · Normal
Answer and see the solution →(a)[1 mark]State the general word equation for the reaction between an acid and a carbonate.
(b)[1 mark]A student reacts magnesium carbonate with dilute hydrochloric acid. Name the gas that is produced in this reaction.
(c)[2 marks]Ammonium carbonate is one example of a soluble carbonate. Using your knowledge of solubility rules, name two other types of carbonates that are also soluble in water.
(d)[2 marks]Give a reason, using solubility rules, why lead(II) carbonate is not a suitable choice to make a soluble salt by the reaction with an acid.
Question 66
6 marks · Normal
Answer and see the solution →(a)[2 marks]Write a balanced chemical equation for the reaction between sodium carbonate and dilute nitric acid.
(b)[4 marks]Describe how you would prepare a pure sample of sodium nitrate using the reaction in part a. Include the main steps and explain how you would separate and obtain the pure salt.