Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Inorganic Chemistry
869 practice questions
Topics covered
- The Alkali Metals85 practice questions
- The Halogens86 practice questions
- Gases in the Atmosphere86 practice questions
- Reactivity Series163 practice questions
- Extraction and Uses of Metals128 practice questions
- Acids, Alkalis and Titrations83 practice questions
- Acids, Bases and Salt Preparations156 practice questions
- Chemical Tests68 practice questions
Practice questions
121–130 of 136 · Hard
Question 121
2 marks · Hard
Answer and see the solution →Give two steps the student must follow to make pure potassium chloride crystals using titration and crystallisation with potassium hydroxide and hydrochloric acid.
Question 122
2 marks · Hard
Answer and see the solution →Write the balanced ionic equation, including state symbols, for the formation of lead(II) sulfate as a precipitate from aqueous solutions.
Question 123
5 marks · Hard
Answer and see the solution →Copper(II) carbonate is an insoluble salt produced by a precipitation reaction between aqueous copper(II) sulfate and sodium carbonate.
(a)[2 marks]Write the full balanced chemical equation, including state symbols, for this reaction.
(b)[1 mark]State the formula of the spectator ions in this reaction.
(c)[2 marks]Explain why these ions are considered spectator ions.
Question 124
2 marks · Hard
Answer and see the solution →Describe how you could make an insoluble salt of calcium sulfate using solutions of soluble salts.
Question 125
2 marks · Hard
Answer and see the solution →State and describe one key difference between the Arrhenius and Bronsted-Lowry theories of acids and bases.
Question 126
5 marks · Hard
Answer and see the solution →Ethanoic acid (CH_3COOH) reacts with ammonia (NH_3) in aqueous solution to form ammonium ethanoate (CH_3COONH_4).
Use the Bronsted-Lowry theory to explain this reaction.
(a)[1 mark]Write a balanced equation for this reaction, including state symbols.
(b)[2 marks]Identify the Bronsted-Lowry acid and base among the reactants, and state which substance donates a proton.
(c)[2 marks]Explain, using the concept of proton transfer, how the products are formed according to the Bronsted-Lowry theory.
Question 127
2 marks · Hard
Answer and see the solution →For the reaction below, identify the acid and the base according to the Bronsted-Lowry definition.
Question 128
2 marks · Hard
Answer and see the solution →A colourless liquid is suspected to contain water, but may also have dissolved salts. You are given a thermometer and a Bunsen burner. State how you would use these to test for the purity of the water and describe what result confirms that it is pure.
Question 129
5 marks · Hard
Answer and see the solution →A student is given three unknown gases: Gas A, Gas B, and Gas C. She is told that one may be ammonia, another is hydrogen, and the third is chlorine. She uses damp red litmus paper to test each gas.
(a)[1 mark]State what is observed when damp red litmus paper is placed in ammonia gas.
(b)[1 mark]Describe what happens to damp red litmus paper when it is exposed to chlorine gas.
(c)[2 marks]Explain why ammonia is the only alkaline gas among the three.
(d)[1 mark]Suggest an additional chemical test to identify hydrogen, apart from using litmus paper. State what result confirms hydrogen is present.
Question 130
2 marks · Hard
Answer and see the solution →A student performs a test for water using anhydrous copper(II) sulfate. The white powder turns blue when a sample liquid is added. State what this test does and does not show about the sample.