Page 14 - Chemistry

Solutions PH VALUES
K 1.5
L 7.0
M 14.0

(i) Select any pair that would react to form a solution of PH 7
(ii) Identify two solutions that would react with aluminium hydroxide. Explain

Air and combustion

1. The set-up below was used to prepare a sample of oxygen gas. Study it and answer
the questions that follow.

H 2O 2

MnO 2

(i) Complete the diagram to show how Oxygen can be collected
(ii) Write a chemical equation of the reaction to produce oxygen

2. Air was passed through several reagents as shown below:
Concentrated
sodium hydroxide Excess copper
Air solution turnings
hydroxide
solution

Excess heated
Escaping magnesium
gases powder

(a) Write an equation for the reaction which takes place in the chamber containing
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