Chemistry
For laboratory preparation of hydrogen, give the following
(a) materials used
(b) method of collection
(c) chemical equation
(d) fully labelled diagram.
Hydrogen
Answer
(a) Granulated zinc, dilute hydrochloric acid or dil. sulphuric acid.
(b) It is collected by the downward displacement of water.
(c) Zn + 2HCl ⟶ ZnCl2 + H2 ↑
(d) Labelled diagram of laboratory preparation of hydrogen:
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(i) acid
(ii) alkali
(iii) water
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