From Paper 1: Advanced Inorganic and Physical Chemistry
11(a)4 marks
Explain why [Cu(H₂O)₆]²⁺ is coloured but [Zn(H₂O)₆]²⁺ is colourless.
From Paper 1: Advanced Inorganic and Physical Chemistry
11(b)3 marks
Write an equation for the reaction of [Co(H₂O)₆]²⁺ with excess concentrated hydrochloric acid and state the colour change.
From Paper 1: Advanced Inorganic and Physical Chemistry
11(c)3 marks
Explain how Fe²⁺ ions catalyse the reaction between peroxodisulfate and iodide ions.
From Paper 3: General and Practical Principles in Chemistry
6(a)4 marks
An iron tablet containing iron(II) sulfate was dissolved in dilute sulfuric acid and titrated with 0.0100 mol dm⁻³ KMnO₄. The titre was 21.50 cm³. Calculate the mass of iron in the tablet.
From Paper 3: General and Practical Principles in Chemistry
6(b)2 marks
Explain why no indicator is needed in this titration.
From Paper 3: General and Practical Principles in Chemistry
11(g)1 mark
Which ion has the electronic configuration [Ar]3d⁶?
Score 0 / 17 · 0 of 6 marked
This paper is written by Plasmo in the style of the Edexcel A-Level Chemistry exam. It is not a past paper and is not produced or endorsed by the exam board.