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Important compounds: NaOH, Na2CO3, NaHCO3, CaO, CaCO3, plaster of Paris
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Single correct option
Difficulty 1 of 3
sb171
The formula of washing soda is
A
NaHCO
X
3
B
Na
X
2
CO
X
3
⋅
2
H
X
2
O
C
Na
X
2
CO
X
3
⋅
H
X
2
O
D
Na
X
2
CO
X
3
⋅
10
H
X
2
O
Answer: D
Washing soda is sodium carbonate decahydrate,
Na
X
2
CO
X
3
⋅
10
H
X
2
O
. The monohydrate is a different, partly dehydrated form.
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