Question

State your observations when : (i) A Magnesium ribbon is burnt in a Jar of Carbon di oxide (ii) CO2 gas is bubbled into Lime water in Moderation and then in Excess.​

Answer 1

Answer:

(1) 2Mg(s)+CO 2 (g)→2MgO(s)+C(s)

(2) Ca(OH) 2+CO 2⇌CaCO 3(+)+H 2O

Explanation:

1. Magnesium burns in carbon dioxide because the oxygen in the carbon dioxide is able to bond with magnesium and produce an oxide.
2. When CO 2passes through lime water, it turns into milky lime water due to formation of insoluble calcium carbonate. Ca(OH) 2+CO 2⇌CaCO 3 (+)+H 2 O+CO 2

is passed for longer period, turbidity disappears due to form of soluble calcium bicarbonate.

CaCO 3 +H 2O+CO 2⇌Ca(HCO3) 2