Question

3(c)(ii). Consider the compounds Na₂CO₃ and NaOH. I. Which of the compounds is suitable for the preparation of a standard alkaline solution? II. Give a reason for your answer in 3(c)(ii)I.

Accepted Answer

I. Na₂CO₃ is suitable for the preparation of a standard alkaline solution.
II. Reason: Na₂CO₃ can be weighed accurately as opposed to NaOH, which is deliquescent (i.e. it absorbs water from the atmosphere), making it unsuitable for preparing an accurately-weighed standard solution.

WAEC Chemistry 2014 Theory — Question 27

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