plumiWhat useful products can be made from acids?: OCR GCSE Combined Science B questions
Every OCR GCSE Combined Science B exam question on C6.1 What useful products can be made from acids?, 2018–2025, with its mark scheme and examiner’s report.
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Calculations
Q1(a)
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Q1(b)(i)
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Q1(a)(ii)
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Q3(a)(i)
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Q3(a)(ii)
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Q4(c)
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Q7(c)
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Q8(a)(i)
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Q8(a)(ii)
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All 65 questions on What useful products can be made from acids?, as a list
- June 2025, Chemistry Paper 2 Foundation, Q1(a) (2 marks): Complete the sentences to describe how to show that a solution is acidic. Put a ring around each correct option. Add a few drops of alkali / universal indicator
- June 2025, Chemistry Paper 2 Foundation, Q1(b)(i) (2 marks): Complete the table. Metal Acid Salt formed Calcium Nitric acid Iron Iron sulfate [2]
- June 2025, Chemistry Paper 2 Foundation, Q1(b)(ii) (2 marks): Pieces of zinc metal react with dilute sulfuric acid to form a solution of zinc sulfate and hydrogen gas. Complete the state symbols in the balanced symbol equa
- June 2025, Chemistry Paper 2 Foundation, Q1(c) (3 marks): Acids react with alkalis to form a salt and water, for example: HCl + NaOH NaCl + H2O Acid Alkali Salt Water Complete the sentences to describe this type of rea
- June 2025, Combined Science Paper 4 Foundation, Q1(a)(i) (1 mark): Which gas is made when magnesium reacts with hydrochloric acid? Tick (✓) one box. Carbon dioxide Hydrogen Oxygen Steam [1]
- June 2025, Combined Science Paper 4 Foundation, Q1(a)(ii) (1 mark): Which salt is made when magnesium reacts with hydrochloric acid? Tick (✓) one box. Magnesium carbonate Magnesium chloride Magnesium hydroxide Magnesium oxide [1
- June 2025, Combined Science Paper 4 Foundation, Q1(b)(i) (1 mark): Hydrochloric acid is made by dissolving hydrogen chloride in water. What forms when acids dissolve in water? Tick (✓) one box. Cl – Cl + H– H+ [1]
- June 2025, Chemistry Paper 6 Higher, Q8(a) (2 marks): Describe the test to identify hydrogen. Test Positive result [2]
- June 2024, Chemistry Paper 2 Foundation, Q3(a)(i) (4 marks): Complete the balanced symbol equation for the reaction between solid zinc carbonate and dilute acid. Include state symbols. [4] ZnCO3(s) + HCl ( ) ZnCl 2( ) + C
- June 2024, Chemistry Paper 2 Foundation, Q3(a)(ii) (2 marks): Name the acid used and the salt formed in this reaction. Acid Salt [2]
- June 2024, Chemistry Paper 2 Foundation, Q3(b)(i) (1 mark): Which statement explains what will happen to the reading on the mass balance as the reaction goes on? Tick (✓) one box. The mass will go down because carbon dio
- June 2024, Chemistry Paper 2 Foundation, Q3(b)(ii) (2 marks): The student decides to measure the volume of carbon dioxide gas. Which two pieces of apparatus should be used? Tick (✓) two boxes. [2]
- June 2024, Chemistry Paper 2 Foundation, Q4(a) (1 mark): Why does the student add copper carbonate until there is unreacted solid? Tick (✓) one box. So that all the acid is used up. So that all the carbonate is used u
- June 2024, Chemistry Paper 2 Foundation, Q4(c) (3 marks): Which stages of the method to produce blue crystals of copper sulfate are true and which are false? Tick (✓) one box in each row. Stage True False Filter and co
- June 2024, Combined Science Paper 4 Foundation, Q1(c) (2 marks): A gas forms when hydrochloric acid and calcium carbonate powder react. Draw one line from the gas collected to the chemical test that can identify the gas. Gas
- June 2024, Chemistry Paper 6 Higher, Q7(c) (2 marks): Ammonium sulfate, (NH4)2SO4, is used by farmers as a fertiliser. Ammonia gas is bubbled into dilute sulfuric acid, H2SO4, to form an aqueous solution of ammoniu
- June 2024, Chemistry Paper 6 Higher, Q8(a)(i) (2 marks): Complete the table. [2]
- June 2024, Chemistry Paper 6 Higher, Q8(a)(ii) (1 mark): Complete the word equation for the reaction between hydrochloric acid and sodium hydroxide. Hydrochloric acid + sodium hydroxide sodium chloride + [1]
- June 2024, Chemistry Paper 6 Higher, Q8(b)(i) (2 marks): [2]
- June 2024, Chemistry Paper 6 Higher, Q8(b)(ii) (1 mark): What is the pH of 0.0001 mol / dm3 dilute hydrochloric acid? [1]
- June 2024, Chemistry Paper 6 Higher, Q8(c)(i) (1 mark): Describe how the student finds the pH using this test. [1]
- June 2024, Chemistry Paper 6 Higher, Q8(c)(ii) (1 mark): The results of the experiment are shown in Table 8.3. Table 8.3 Concentration of CH3COOH (aq) pH (mol / dm3) 0.1 3 0.01 3 0.001 4 Describe how the student can c
- June 2023, Chemistry Paper 2 Foundation, Q3(a) (2 marks): Complete the sentence to describe neutralisation in terms of ions. Use the ions and formulae. H+ Na+ OH– NO3 – NaNO3 H2O HNO3 NaOH Neutralisation is when ions f
- June 2023, Chemistry Paper 2 Foundation, Q3(b)(i) (2 marks): The method does not say how he will know when neutralisation has occurred. Explain what should be added to the method so that he knows when to stop adding acid.
- June 2023, Combined Science Paper 4 Foundation, Q5(a)(i) (1 mark): Which gas is produced in this reaction? Tick (✓) one box. Carbon dioxide Hydrogen Nitrogen Oxygen [1]
- June 2023, Chemistry Paper 6 Higher, Q3(a)(i) (2 marks): Describe neutralisation by naming each type of compound in this reaction. Mg(OH)2 + 2HNO3 Mg(NO3)2 + 2H2O + + water [2]
- June 2023, Chemistry Paper 6 Higher, Q3(a)(ii) (2 marks): Neutralisation can also be described as the reaction between ions. Give the formulae of the ions that are involved in neutralisation and the product of the reac
- June 2023, Chemistry Paper 6 Higher, Q3(b)(i) (2 marks): Complete the word equation for the reaction between zinc and hydrochloric acid. zinc + hydrochloric acid + [2]
- June 2023, Chemistry Paper 6 Higher, Q6(a)(i) (1 mark): Why should there be some solid copper oxide left in the beaker? [1]
- June 2023, Chemistry Paper 6 Higher, Q6(b) (4 marks): When the reaction has finished, Alex uses the contents of the beaker to make pure, dry crystals of copper sulfate. Describe the method that Alex uses. [4]
- June 2022, Chemistry Paper 2 Foundation, Q3(a)(i) (1 mark): Complete the balanced symbol equation for the reaction between magnesium hydroxide and hydrochloric acid. Mg(OH)2 + HCl MgCl 2 + H2O [1]
- June 2022, Chemistry Paper 2 Foundation, Q3(a)(ii) (3 marks): Draw lines to connect each compound from the reaction with its correct description. Compound Description HCl Acid H2O Alkali MgCl 2 Salt Mg(OH)2 Water [3]
- June 2022, Chemistry Paper 2 Foundation, Q3(b) (3 marks): Complete the sentence about neutralisation. Use the symbols and words from the list. acid alkali water Cl – H+ Mg2+ OH– Neutralisation occurs when ions from an
- June 2022, Chemistry Paper 2 Foundation, Q3(c) (1 mark): Milk of magnesia is a medicine used to neutralise excess acid in the stomach. Milk of Magnesia One 15 cm3 spoonful contains 1200 mg of magnesium hydroxide. Leo
- June 2022, Chemistry Paper 6 Higher, Q7(a) (3 marks): Complete the word and balanced symbol equations for the reaction between nitric acid and sodium hydroxide. nitric acid + sodium hydroxide + water + NaNO3 + H2O
- June 2022, Chemistry Paper 6 Higher, Q7(b) (2 marks): Identify the two ions involved in a neutralisation reaction and state where they come from. 1 2 [2]
- June 2022, Chemistry Paper 6 Higher, Q7(c)(i) (2 marks): Describe the change in H+ concentration and the relative acidity and alkalinity of a solution as the pH number changes. H+ concentration acidity and alkalinity
- June 2022, Chemistry Paper 6 Higher, Q7(c)(ii) (1 mark): A solution with pH 7 is neutral. What is the H+ concentration of a neutral solution? H+ concentration = mol / dm3 [1]
- June 2022, Chemistry Paper 6 Higher, Q7(d) (2 marks): Anika plans an experiment to find out how the pH changes when different amounts of alkali are added to an acid. She starts with 25 cm3 of nitric acid and adds 5
- November 2021, Chemistry Paper 2 Foundation, Q5 (6 marks): Kai makes some copper sulfate crystals. He uses solid copper carbonate and 20 cm3 of dilute 5* sulfuric acid. The pictures show some of the apparatus he uses. T
- November 2021, Chemistry Paper 2 Foundation, Q8(a) (1 mark): Magnesium hydroxide reacts with dilute hydrochloric acid to form a salt and water. Complete the word equation for the reaction. magnesium hydrochloric + + hydro
- November 2020, Chemistry Paper 2 Foundation, Q5(a)(i) (3 marks): Draw lines to connect each salt with the acid and alkali that are used to make it. Acid Salt Alkali Hydrochloric acid Calcium sulfate Sodium hydroxide Sodium ch
- November 2020, Chemistry Paper 6 Higher, Q9(a)(i) (2 marks): Give two ways in which Table 9.1 shows that ethanoic acid and hydrochloric acid are both acids. 1 2 [2]
- November 2020, Chemistry Paper 6 Higher, Q9(a)(ii) (2 marks): Predict the pH and concentration of hydrogen ions for a solution of 0.001 mol / dm3 hydrochloric acid. pH = Concentration of hydrogen ions = mol / dm3 [2]
- November 2020, Chemistry Paper 6 Higher, Q9(b)(i) (2 marks): Explain what is meant by a strong acid and a weak acid. [2]
- November 2020, Chemistry Paper 6 Higher, Q9(b)(ii) (2 marks): How does the information in Table 9.1 show that hydrochloric acid is a strong acid and ethanoic acid is a weak acid? [2]
- November 2020, Chemistry Paper 6 Higher, Q9(c)(i) (2 marks): Write the ionic equation for this reaction. [2]
- June 2019, Chemistry Paper 2 Foundation, Q4(a) (3 marks): Complete the word and balanced symbol equations for the reaction between magnesium and hydrochloric acid. hydrochloric magnesium + + hydrogen acid + HCl MgCl2 +
- June 2019, Chemistry Paper 2 Foundation, Q8(b)(i) (2 marks): Describe one method of measuring the pH of each solution. [2]
- June 2018, Chemistry Paper 2 Foundation, Q4(b) (2 marks): Jack decides to make copper sulfate by reacting a compound of copper with dilute sulfuric acid. Which copper compounds react with dilute sulfuric acid to make c
- June 2018, Chemistry Paper 2 Foundation, Q4(c)(i) (1 mark): Which method should Jack use to separate the dilute copper sulfate solution from the solid copper oxide? Put a ring around the correct answer. Condensation Crys
- June 2018, Chemistry Paper 2 Foundation, Q4(c)(ii) (4 marks): Jack makes some crystals from the dilute copper sulfate. He starts by setting up this apparatus. Describe how Jack can use this apparatus to make crystals. [4]
- June 2018, Chemistry Paper 2 Foundation, Q7(b)(i) (1 mark): The calcium carbonate reacts with the hydrochloric acid to form calcium chloride, carbon dioxide gas and water. Complete the word equation for the reaction by f
- June 2018, Chemistry Paper 2 Foundation, Q7(b)(ii) (1 mark): Jane adds some indigestion tablets to some hydrochloric acid in a beaker. Jane sees bubbles of carbon dioxide form when she adds the tablets to the acid. Descri
- June 2018, Chemistry Paper 2 Foundation, Q7(b)(iii) (1 mark): Jane tests the carbon dioxide that is made. What is the correct test for carbon dioxide? Tick (✓) one box. Relights a glowing splint. Pops a lighted splint. Ble
- June 2018, Combined Science Paper 4 Foundation, Q1(a) (1 mark): Eve makes the sodium chloride by reacting hydrochloric acid with sodium carbonate solution. Complete the risk assessment in Table 1.1 for the hydrochloric acid.
- June 2018, Combined Science Paper 4 Foundation, Q1(b)(i) (1 mark): Which piece of apparatus, A, B, C or D, should she use to add the hydrochloric acid? Put a ring around the correct answer. A B C D [1]
- June 2018, Combined Science Paper 4 Foundation, Q1(b)(ii) (1 mark): Eve adds a few drops of a chemical to a conical flask containing the sodium carbonate solution. The chemical added changes colour. What is the name of this type
- June 2018, Combined Science Paper 4 Foundation, Q1(c)(i) (2 marks): Complete and balance the chemical equation for the reaction between sodium carbonate solution and hydrochloric acid. sodium carbonate + hydrochloric acid → sodi
- June 2018, Combined Science Paper 4 Foundation, Q1(c)(ii) (1 mark): Which statement about the reaction between sodium carbonate solution and hydrochloric acid is correct? Tick (✓) one box. All the products are in the aqueous sta
- June 2018, Combined Science Paper 4 Foundation, Q1(d) (1 mark): Which process is used to produce solid sodium chloride from sodium chloride solution? Tick (✓) one box. Chromatography Crystallisation Filtration [1]
- June 2018, Chemistry Paper 6 Higher, Q7(c) (2 marks): Alex does an experiment to find out if he can make aluminium at room temperature. He starts by making a solution of aluminium sulfate. He reacts solid aluminium
- June 2018, Chemistry Paper 6 Higher, Q10(a) (2 marks): Describe a different way that the pH of an acid can be measured. [2]
- June 2018, Chemistry Paper 6 Higher, Q10(b) (2 marks): Ling tests the pH of solutions of a strong acid and a weak acid. Both acids have the same concentration. She finds that the strong acid has a much lower pH. Exp
- June 2018, Chemistry Paper 6 Higher, Q10(c) (2 marks): The table shows information about three different acid solutions. Complete the table for the three solutions. Acid Concentration of Concentration of hydrogen Ty
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