Question

washing soda exposed to air gives______
a)Na2CO3.9H2O
b)Na2CO3.7H2O
c)Na2CO3.5H2O
d)Na2CO3.H2O​

Answer 1

Answer:

(a) Na2CO3.9H2O (Answer)

• washing soda exposed to air gives Na2CO3.9H2O.

★ When washing soda exposed to air then it loses its 10 water of crystallization. This process is called Efflorescence.

Na2CO3.10H2O ==> Na2CO3 + 10H2O

꧁ᴍɪss_ɪɴɴᴏᴄᴇɴᴛ꧂

Answer 2

Answer:

d) Na2CO3.H20

Explanation:

Na2CO3.10H2O ------in air-------------------->  Na2CO3.H2O + 9H20