Question

1 g Ca was burnt in excess of O, and the oxide
was dissolved in water to make up one litre of
solution. The normality of solution is
(1) 0.04
(2) 0.4
(3) 0.05
(4) 0.5​

Answer 1

Answer:

Correct option is:-

(4) 0.05

Explanation:

We have,

Ca+(1/2)O2→CaO

CaO+H2O→Ca(OH)2

Mass of calcium = 1g

Moles of calcium = 401=0.025

0.025 moles of calcium = 0.025 moles of Ca(OH)2

n-factor = 2 for Ca(OH)2

Normality =12×0.025=0.05N

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