Question

0.70g of a sample of na2co3.xh2o were dissolved in water and the volume was made to 100ml;20ml of this solution required 19.8ml of N/10hcl for complete neutralisation.the value of x​

Answer 1

Answer:

Explanation:

for 20ml equivalent is 1.98

for 100 ml equivalent is 9.9

equivalent = moles*f*1000

9.9=moles*2000

moles=0.00495

0.7 / 106+18x = 0.00495

18x=141.41

x=8