(a)(i) State two physical properties of hydrogen sulphide (ii) Name the laboratory equipment used for intermittent production of hydrogen sulphide (b) What ...
Question 1 Report
(a)(i) State two physical properties of hydrogen sulphide
(ii) Name the laboratory equipment used for intermittent production of hydrogen sulphide
(b) What property of hydrogen sulphide is illustrated in the reaction represented by the following equation?
H\(_2\)S\(_{(g)}\) + 2NaOH\(_{(aq)}\) \(\to\) Na\(_2\)S\(_{(aq)}\) + H\(_2\)O\(_{(l)}\)
Answer Details
(a)(i) Two physical properties of hydrogen sulphide
- It is a colourless gas with an offensive smell (like that of rotten eggs).
- It is denser than air and is slightly soluble in water.
(It is also poisonous; any two physical properties are acceptable.)
(a)(ii) Laboratory equipment for intermittent production of hydrogen sulphide
Kipp's apparatus.
(b) Property illustrated
In the reaction H2S(g) + 2NaOH(aq) → Na2S(aq) + 2H2O(l), hydrogen sulphide reacts with a base (sodium hydroxide) to form a salt and water. This illustrates the acidic property of hydrogen sulphide (it behaves as an acid).
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