Cambridge O Level · 5070 · Paper 2 · Theory

Chemistry 5070/22 May/June 2025 past paper

Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 2, May/June 2025: the question paper and its official mark scheme, 8 questions worth 80 marks, with the grade thresholds. Free to open, no account needed.

Questions: 8
Marks: 80
Grade A from: 54

Open the question paper Mark scheme

File names: 5070_s25_qp_22 · 5070_s25_ms_22

Grade thresholds for 5070/22 May/June 2025

The minimum raw marks Cambridge set for each grade on this component (out of 80). Thresholds change every session and variant, so always compare your score with the paper you actually sat.

A	B	C	D	E
54	39	23	18	13

Topics in this paper

Which syllabus chapters 5070/22 May/June 2025 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
Organic chemistry	2	23
Stoichiometry	1	16
Electrochemistry	2	14
Chemistry of the environment	1	11
Atoms, elements and compounds	1	9
Metals	1	7

Questions in 5070/22 May/June 2025

Question 1Electrochemistry · 5 marks
Choose from the following salts to answer the questions. aluminium sulfate barium chloride copper(II) nitrate copper(II) sulfate magnesium chloride potassium iodide potassium manganate(VII) silver chloride sodium bromide Each salt can be used once, more than once or not at all. …
Question 2Electrochemistry · 9 marks
A dilute aqueous solution of magnesium chloride is electrolysed using graphite electrodes. (a) Graphite has a high melting point and is inert. (i) Explain why graphite has a high melting point. Use ideas about structure and bonding. (ii) State one …
Question 3Atoms, elements and compounds · 9 marks
The equation for the reaction between ethene and bromine is shown in Fig. …
Question 4Organic chemistry · 13 marks
Ethanoic acid, CH3COOH, is a member of the homologous series of carboxylic acids. (a) Give the general formula of the homologous series of carboxylic acids. (b) One characteristic of a homologous series is that all the compounds share similar chemical …
Question 5Chemistry of the environment · 11 marks
The combustion of fossil fuels is used in some power stations. (a) Some power stations use diesel oil as a fuel. (i) One compound in diesel oil has the formula C12H26. Construct the symbol equation to show the complete combustion …
Question 6Stoichiometry · 16 marks
Bromine, Br2, is in Group VII of the Periodic Table. (a) The melting point of bromine is –7 °C and the boiling point is …
Question 7Metals · 7 marks
Iron is used to make stainless steel. Stainless steel is used to make cutlery because it is resistant to rusting. (a) Give one other reason why stainless steel is used to make cutlery. (b) Stainless steel is an alloy. Give …
Question 8Organic chemistry · 10 marks
Fig. 8.1 shows the displayed formula of compound …

Other Chemistry papers from May/June 2025

Questions students ask

Where can I get the 5070/22 May/June 2025 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (5070_s25_ms_22), and on a wide screen it sits beside the question you are reading.

What was the grade threshold for an A in 5070/22 May/June 2025?

54 marks out of 80, a C needed 23.

Which topics came up in 5070/22 May/June 2025?

Mostly Organic chemistry, Stoichiometry, Electrochemistry. The full list is in the table above.

Do I need an account to open 5070/22 May/June 2025?

No. Every paper opens for free without signing in. A free account also saves your pen marks and records your score against the grade thresholds.