Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Reactions of acids
18 practice questions
Practice questions
1–8 of 8 · Normal
Question 1
2 marks · Normal
Answer and see the solution →State the products when zinc reacts with dilute sulfuric acid. Write a balanced chemical equation for this reaction.
Question 2
4 marks · Normal
Answer and see the solution →Answer the following about acids and bases.
(a)[1 mark]State the definition of an acid in terms of proton transfer.
(b)[1 mark]State the definition of a base in terms of proton transfer.
(c)[2 marks]Ammonia reacts with hydrochloric acid to form ammonium chloride. Write an equation for the reaction and identify which species acts as the proton donor.
Question 3
3 marks · Normal
Answer and see the solution →Explain, in terms of proton transfer, what happens when sodium hydroxide reacts with nitric acid. Include the role of each substance as an acid or base.
Question 4
4 marks · Normal
Answer and see the solution →The table shows observations during reactions between different metals and dilute acids:
Observations when metals react with acids Metal Acid Observation Magnesium Hydrochloric acid Rapid fizzing, heat produced, magnesium disappears Iron Sulfuric acid Slow fizzing, little heat, iron remains after reaction Zinc Hydrochloric acid Moderate fizzing, slow disappearance of metal (a)[2 marks]Which metal is the least reactive based on the observations? Give a reason for your answer.
(b)[2 marks]Write a balanced chemical equation for the reaction between magnesium and hydrochloric acid.
Question 5
1 mark · Normal
Answer and check →Which statement about acids and bases is correct?
- A.An acid is a substance that accepts a proton.
- B.A base is a substance that donates a proton.
- C.An acid is a proton donor and a base is a proton acceptor.
- D.A base is a proton donor and an acid is a proton acceptor.
Question 6
2 marks · Normal
Answer and see the solution →Name the gas formed when a metal such as magnesium reacts with dilute hydrochloric acid. State the test for this gas.
Question 7
4 marks · Normal
Answer and see the solution →The following questions concern acids and bases.
(a)[1 mark]Define the term 'base' in terms of proton transfer.
(b)[1 mark]Complete the following equation for a reaction between an acid and a base:
(c)[2 marks]Explain, in terms of proton transfer, what happens in this reaction.
Question 8
3 marks · Normal
Answer and see the solution →Magnesium reacts with dilute sulfuric acid to produce magnesium sulfate and hydrogen gas according to the equation:
Calculate the maximum mass of magnesium sulfate (MgSO₄) that can be formed by completely reacting 2.40 g of magnesium with excess dilute sulfuric acid.
Give your answer to 2 decimal places. (Relative atomic masses: Mg = 24.0, S = 32.1, O = 16.0)