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
591–600 of 869
Question 591
3 marks · Easy
Answer and see the solution →Read the passage and answer the questions below. Acids release hydrogen ions ([32mH^+[0m) in water, making the solution acidic.
(a)[1 mark]Name the ion formed in solution when hydrochloric acid is added to water.
(b)[1 mark]Give the symbol for this ion.
(c)[1 mark]Explain, using the equation, what happens when [32mHCl[0m is dissolved in water.
Question 592
3 marks · Easy
Answer and see the solution →The following table shows the formulae of several acids. Use the table to answer the questions below.
Table 1. Some common acids and their formulae. Acid Formula Hydrochloric acid HCl Nitric acid HNO₃ Sulfuric acid H₂SO₄ Phosphoric acid H₃PO₄ Ethanoic acid CH₃COOH (a)[1 mark]Identify the ion that all acids in the table produce when dissolved in water.
(b)[1 mark]State the chemical symbol and charge of this ion.
(c)[1 mark]Explain, using the formulae in the table, how you know that each acid can form this ion.
Question 593
2 marks · Easy
Answer and see the solution →A student dissolves 0.20 mol of sodium carbonate (Na_2CO_3) in enough water to make 1.0 dm³ of solution. Sodium carbonate forms an alkaline solution because it reacts to produce hydroxide ions.
Calculate the concentration of carbonate ions (CO_3^{2-}) present in the solution. Give your answer in mol/dm³.
Question 594
2 marks · Normal
Answer and see the solution →State the name and the formula of the ion responsible for acidity in aqueous solutions.
(a)[1 mark]Name of the ion:
(b)[1 mark]Formula of the ion:
Question 595
4 marks · Normal
Answer and see the solution →Potassium carbonate and ammonia both form alkaline solutions in water.
(a)[2 marks]Write a balanced chemical equation to show how ammonia forms an alkaline solution when dissolved in water.
(b)[2 marks]State the name and formula of the ion responsible for alkalinity in these solutions.
Question 596
3 marks · Normal
Answer and see the solution →Explain why a solution of sodium carbonate in water is alkaline, even though sodium carbonate does not contain hydroxide ions in its original formula.
Question 597
4 marks · Normal
Answer and see the solution →The following table shows the concentration of hydrogen ions in different solutions.
Solution [H^+] (mol/dm³) A 1.0 × 10^{-2} B 1.0 × 10^{-6} C 1.0 × 10^{-4} D 1.0 × 10^{-8} (a)[2 marks]Which solution is the most acidic? Explain your answer.
(b)[1 mark]Which solution is likely to have a pH above 7? Give the letter.
(c)[1 mark]State the relationship between hydrogen ion concentration and acidity.
Question 598
1 mark · Normal
Answer and check →Which of the following substances forms an alkaline solution by reacting with water to produce hydroxide ions?
- A.Sodium chloride
- B.Potassium carbonate
- C.Calcium sulfate
- D.Ethanoic acid
Question 599
2 marks · Normal
Answer and see the solution →State the formula of the ion present in all alkaline solutions and give its charge.
Question 600
4 marks · Normal
Answer and see the solution →Some cleaning products are described as 'alkaline'.
(a)[2 marks]Ammonia is commonly found in cleaning products. State the ions that are produced when ammonia reacts with water.
(b)[2 marks]Explain why solutions of ammonia are described as alkaline.