Qualitative Analysis - Result Question 57

60. Aluminium sulphide gives a foul odour when it becomes damp. Write a balanced chemical equation for the reaction.

(1997)

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Solution:

$\mathrm{Al}_2 \mathrm{~S}_3+6 \mathrm{H}_2 \mathrm{O} \longrightarrow 2 \mathrm{Al}(\mathrm{OH})_3 \downarrow+\underset{\text { Foul odour }}{3 \mathrm{H}_2 \mathrm{~S} \uparrow}$