Chemistry 5070 · O Level · Experimental design

Experimental design — practice question

The laboratory contains the apparatus shown below. The diagrams illustrate three techniques for collecting gases.
(a)[4]

Write the letter of the most appropriate apparatus in the table for each use: - taking $25.0\,\text{cm}^3$ of liquid out of a container, - finding the volume of $60\,\text{cm}^3$ of a liquid, - being used as a titrating flask, - removing a precipitate from a solution.

(b(i))[1]

Which of X, Y or Z is suitable for collecting a gas that is less dense than air and soluble in water?

(b(ii))[1]

Which of X, Y or Z is suitable for collecting a gas that is more dense than air and soluble in water?

(b(iii))[1]

Which of X, Y or Z is suitable for collecting a gas that is insoluble in water?

Worked solution & mark scheme

This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: C is the correct letter.

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