WAEC Chemistry 2010 Theory — Question 43

Question 43 of 46 from the West African Examinations Council (WAEC) Chemistry 2010 Theory paper, with the correct answer and a full explanation.

8a(ii) Give one chemical test for water.

Model answer

The suspected substance should be brought in contact with cobalt (II) chloride paper. If the colour changes from blue to pink (or anhydrous CuSO4 turns from white to blue), the suspected substance contains water.

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