Question & Answer » Chemistry Questions » What Happens When (i) Magnesium is Burnt in the Air (ii) Quick Lime is Heated With Silica (iii) Chlorine Reacts with Slaked Lime (iv) Calcium Nitrate is Heated?
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What Happens When (i) Magnesium is Burnt in the Air (ii) Quick Lime is Heated With Silica (iii) Chlorine Reacts with Slaked Lime (iv) Calcium Nitrate is Heated?

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(i) Magnesium Oxide is formed when magnesium ribbon burns and reacts with oxygen in the air. This reaction is known as the oxidation reaction of magnesium. The chemical equation is:

2Mg(s)+O2(g)→2MgOs

(ii) Calcium silicate is formed when quick lime (CaO) is heated with silica.

CaO+SiO2→CaSiO3

(iii) When chlorine is run over slaked lime, Ca(OH)2, it is quickly absorbed, resulting in bleaching powder or calcium oxychloride and water.

Ca(OH)2+Cl2→CaOCl2+H2O

(iv) Quick lime (CaO) is formed when Calcium Nitrate is heated. Also NO2, and O2 are produced by heating calcium nitrate.

Ca(NO3)2CaO+NO2+O2

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