3.3 Types of chemical reactions

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63

Question 17

Magnesium reacts with ions of a metal, Q. The charge on each Q ion is represented by $n +$ .

3\text{Mg} + 2\text{Q}^{n+} \rightarrow 3\text{Mg}^{2+} + 2\text{Q}

Deduce the value of $n$ . Explain whether this reaction is a redox reaction in terms of electron transfer and in terms of oxygen transfer.

[5]

Markscheme

3.3 Types of chemical reactions Questions

GCSE
Chemistry
3.3 Types of chemical reactions

112 exam-style questions on OCR GCSE Chemistry 3.3 Types of chemical reactions, covering 3.3.1 Oxidation and reduction in terms of oxygen, 3.3.2 Acids, alkalis and neutralisation, 3.3.3 The pH scale and measuring pH, 3.3.4 Oxidation and reduction in terms of electrons, 3.3.5 Dilute and concentrated, weak and strong acids, and 3.3.6 Hydrogen ion concentration and pH. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank·3.3 Types of chemical reactions