Describe the method of preparation of
hydrogen sulphide using Kipp’s apparatus. OR
Explain
the working of Kipp’s apparatus. OR
Draw
a neat labelled diagram of Kipp’s apparatus and describe its working.
Ans.
Construction: - Kipp’s apparatus consists of three globes. The upper globe (A)
consists of a long tapering tube at the bottom. The middle and the lower two
globes (B and C) are connected with a narrow collar. The upper globe is fitted
in the lower globe as shown in the figure.
Working: - Iron sulphide pieces are taken in globe B and dilute
hydrochloric acid poured in globe A. When the stopcock D is opened, the acid
runs down into globe C and rises up into iron sulphide. The reaction takes
place and hydrogen sulphide gas is liberated. When the stopcock is closed, the
gas is unable to escape pressure; the acid is pushed down in globe C and loses
contact with iron sulphide. The reaction stops and hydrogen sulphide is not
formed. Thus, the gas can be generated as and when required.
