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What happens when
(i) lead (II) nitrate is heated ?
(ii) iron (II) sulphate is heated ?
(iii) silver chloride is exposed to sunlight ?
Write balanced chemical equations of the reactions involved in support of your answer.
(i) lead (II) nitrate is heated ?
(ii) iron (II) sulphate is heated ?
(iii) silver chloride is exposed to sunlight ?
Write balanced chemical equations of the reactions involved in support of your answer.
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(i) Brown fumes of nitrogen dioxide are formed. (½ Mark)
$\ce{2Pb(NO3)2(s) ->[Heat] 2PbO(s) + 4NO2(g) + O2(g)}$ (½ Mark)
(ii) Smell of burning sulphur is observed/ Colour of crystal changes. (½ Mark)
$\ce{2FeSO4(s) ->[Heat] Fe2O3(s) + SO2(g) + SO3(g)}$ (½ Mark)
(iii) White silver chloride turns grey. (½ Mark)
$\ce{2AgCl(s) ->[Sunlight] 2Ag(s) + Cl2(g)}$ (½ Mark)
(Note: Award full marks if balanced chemical equation is written)
$\ce{2Pb(NO3)2(s) ->[Heat] 2PbO(s) + 4NO2(g) + O2(g)}$ (½ Mark)
(ii) Smell of burning sulphur is observed/ Colour of crystal changes. (½ Mark)
$\ce{2FeSO4(s) ->[Heat] Fe2O3(s) + SO2(g) + SO3(g)}$ (½ Mark)
(iii) White silver chloride turns grey. (½ Mark)
$\ce{2AgCl(s) ->[Sunlight] 2Ag(s) + Cl2(g)}$ (½ Mark)
(Note: Award full marks if balanced chemical equation is written)