Cambridge O Level · 5070 · Paper 2 · Theory

Chemistry 5070/22 May/June 2015 past paper

Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 2, May/June 2015: the question paper and its official mark scheme, 9 questions worth 85 marks, with the grade thresholds. Free to open, no account needed.

Questions: 9
Marks: 75
Grade A from: 53

Open the question paper Mark scheme

File names: 5070_s15_qp_22 · 5070_s15_ms_22

Grade thresholds for 5070/22 May/June 2015

The minimum raw marks Cambridge set for each grade on this component (out of 75). Thresholds change every session and variant, so always compare your score with the paper you actually sat.

A	B	C	D	E
53	37	25	20	14

Topics in this paper

Which syllabus chapters 5070/22 May/June 2015 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
Organic chemistry	2	20
Acids, bases and salts	2	15
Chemical energetics	1	12
Atoms, elements and compounds	1	12
Metals	1	10
Stoichiometry	1	9
Electrochemistry	1	7

Questions in 5070/22 May/June 2015

Question 1Acids, bases and salts · 5 marks
A1 Choose from the following compounds to answer the questions opposite. …
Question 2Chemical energetics · 12 marks
A2 Hydrogen reacts with halogens to form hydrogen halides. (a) Predict which halogen reacts most violently with hydrogen. (b) The reaction between hydrogen and chlorine is exothermic. H2(g) + Cl 2(g) 2HCl …
Question 3Atoms, elements and compounds · 12 marks
A3 Two isotopes of phosphorus are 31 15P and …
Question 4Stoichiometry · 9 marks
A4 The flow chart shows some reactions of iron(II) sulfate, FeSO4. brown solid A colourless gas that turns acidified potassium manganate(VII) colourless B colourless gas which has 40% by mass sulfur and 60% by mass oxygen C FeSO4(s) FeSO4(aq) reagent …
Question 5Electrochemistry · 7 marks
A5 Electrolysis is often used in the extraction and purification of elements. (a) Magnesium is manufactured by the electrolysis of molten magnesium chloride. Write equations for the two electrode reactions that occur during this electrolysis. (b) Copper can be purified …
Question 6Acids, bases and salts · 10 marks
B6 Ammonium carbonate, (NH4)2CO3, is a white solid that is a component of ‘smelling salts’. It decomposes when it is heated. (NH4)2CO3(s) 2NH3(g) …
Question 7Metals · 10 marks
B7 Titanium can be manufactured by heating titanium(IV) chloride, TiCl 4, with magnesium. (a) Construct the equation for this reaction. (b) Explain why this reaction involves both oxidation and reduction. (c) What mass of titanium can be made from 125 …
Question 8Organic chemistry · 10 marks
B8 The flow chart shows the steps involved in the manufacture of poly(propenenitrile). poly(propenenitrile) crude oil propene propenenitrile (a) Long chain alkanes such as C17H36 can be cracked to form propene, C3H6. Construct an equation to show the cracking of …
Question 9Organic chemistry · 10 marks
B9 Alkenes are a homologous series of unsaturated hydrocarbons. The table shows information about some alkenes. alkene molecular formula melting point / °C boiling point / °C ethene …

Other Chemistry papers from May/June 2015

Questions students ask

Where can I get the 5070/22 May/June 2015 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (5070_s15_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 2015?

53 marks out of 75, a C needed 25.

Which topics came up in 5070/22 May/June 2015?

Mostly Organic chemistry, Acids, bases and salts, Chemical energetics. The full list is in the table above.

Do I need an account to open 5070/22 May/June 2015?

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.