1.

Calculate the equivalent mass of hydrated sodium carbonate.

Answer»

Solution :Hydrated sodium carbonate = `Na_(2)CO_(3)*10H_(2)O`
Molecular mass of `Na_(2)CO_(3)*10H_(2)O=(23xx2) + (12xx1) + (16 XX 13) + (1xx20)`
= 46+ 12 + 208 + 20
= 286
Equivalent mass of `Na_(2)CO_(3)*10H_(2)O = ("Molecular mass")/("ACIDITY")`
= `286/2 = `143


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