Gas volume exercise 2

Calcium metal is sold in small beads which are not protected by an oil covering used for the Group 1 metals and the more reactive Group 2 metals lower in the group. Consequently, surface oxidation takes place forming calcium oxide. Old samples of calcium can be almost entirely made up of calcium oxide!

Calcium metal reacts quite rapidly with water to form hydrogen gas. Design an experiment to measure the percentage purity of a fresh sample of calcium using a gas volume measurement method. You should indicate appropriate apparatus, method, quantities of reagents and safety considerations.

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