Question

(8) The number of water molecules of crystallization in washing soda is
(a)1
(b)10
(c)5
(d)7​

Answer 1

Answer:

b 10

Explanation:

na2co3.10h20

Answer 2

Answer:

b.10

Washing soda has 10 water molecules as water of crystallisation. Water of crystallisation is the fixed number of water molecules present in one formula unit of a salt. When washing soda is exposed to air, it loses 9 molecules of crystallisation and becomes sodium carbonate monohydrate.