Inorganics in aqueous solution

The topics covered in this Starter for ten are: acid base chemistry, BrØnsted-Lowry and Lewis bases, ligand substitution reactions, inference from aqueous tests.

Example questions

For each of the test tube reactions described below;

(a) Write a balanced symbol equation (including state symbols) for the reactions occurring,

(b) Describe what you would expect to observe.

1. Sodium hydroxide solution is added dropwise to an aqueous solution of copper(II) sulfate until present in excess.

Equation

Observations

2. Sodium hydroxide solution is added dropwise to an aqueous solution of iron(II) sulfate until present in excess.

Equation

Observations

3. Sodium carbonate solution is added dropwise to an aqueous solution of manganese(II) sulfate until present in excess.

Equation

Observations

4. Sodium carbonate solution is added dropwise to an aqueous solution of iron(IIl) chloride until present in excess.

Equation

Observations

5. Sodium hydroxide solution is added dropwise to an aqueous solution of chromium(III) sulfate until present in excess.

Equation(s)

Observations

A Brønsted-Lowry base is a proton acceptor. A Lewis base donates a pair of electrons.

In each of the test tube reactions described below, ammonia acts either as a Brønsted-Lowry base or a Lewis base. Complete the descriptions by filling in the blanks labelled 1-10

Notes

A full version of this question and answer sheet is available from the ‘Downloads’ section below. An editable version is also available.