0.70 g of a sample of Na_(2)CO_(3).xH_(2)O were dissolved in water and the volume was made to 100 ml. 20 ml of this solution required 19.8 ml of (N/10) HCl for complete neutralisation. The value of x is

0.70 g of a sample of Na_(2)CO_(3).xH_(2)O were dissolved in water and

1.	0.70 g of a sample of Na_(2)CO_(3).xH_(2)O were dissolved in water and the volume was made to 100 ml. 20 ml of this solution required 19.8 ml of (N/10) HCl for complete neutralisation. The value of x is
Answer» 2 1 4 10 Solution :Eq. `Na_(2)CO_(3)` = eq. HCl `20xxN=19.8xx(1)/(10)impliesN=(19.8)/(200)` `(W)/(VxxM.wt)xx2=(19.8)/(200)impliesM.wt=141.4impliesx=2`