From Mock A · Paper 1: Inorganic and Physical Chemistry
10.36 marks
6.30 g of hydrated iron(II) sulfate, FeSO₄·xH₂O, was dissolved and made up to 250 cm³. A 25.0 cm³ portion required 22.40 cm³ of 0.0200 mol dm⁻³ KMnO₄ in acidic solution.
MnO₄⁻ + 8H⁺ + 5Fe²⁺ → Mn²⁺ + 4H₂O + 5Fe³⁺
Calculate the value of x.
From Mock A · Paper 3: Practical skills, all content and multiple choice
5.45 marks
Using E° values, explain why acidified potassium manganate(VII) can oxidise iron(II) ions but iron(III) cannot oxidise manganese(II) ions. MnO₄⁻/Mn²⁺ +1.51 V; Fe³⁺/Fe²⁺ +0.77 V.
From Mock A · Paper 3: Practical skills, all content and multiple choice
121 mark
What is the oxidation state of chromium in Cr₂O₇²⁻?
From Mock B · Paper 1: Inorganic and Physical Chemistry
7.12 marks
Give the oxidation states of manganese in MnO₄⁻ and chromium in Cr₂O₇²⁻.
From Mock B · Paper 1: Inorganic and Physical Chemistry
7.23 marks
Write half-equations for the reduction of MnO₄⁻ to Mn²⁺ in acid and the oxidation of Fe²⁺, and combine them into an overall equation.
From Mock B · Paper 3: Practical skills, all content and multiple choice
85 marks
25.0 cm³ of a solution of iron(II) ions required 18.20 cm³ of 0.0200 mol dm⁻³ acidified KMnO₄ for complete reaction. Calculate the concentration of Fe²⁺ and explain why no indicator is needed.
From Mock B · Paper 3: Practical skills, all content and multiple choice
171 mark
What is the oxidation state of sulfur in Na₂S₂O₃?
From Mock C · Paper 1: Inorganic and Physical Chemistry
7.13 marks
Balance: Cr₂O₇²⁻ + Fe²⁺ + H⁺ → Cr³⁺ + Fe³⁺ + H₂O.
From Mock C · Paper 1: Inorganic and Physical Chemistry
7.22 marks
In the reaction between dichromate(VI) and iron(II) ions, identify the oxidising agent and the reducing agent.
From Mock C · Paper 3: Practical skills, all content and multiple choice
161 mark
In 2Na + Cl₂ → 2NaCl, chlorine is
Score 0 / 29 · 0 of 10 marked
This paper is written by Plasmo in the style of the AQA A-Level Chemistry exam. It is not a past paper and is not produced or endorsed by the exam board.