Question

7 of na2co3.Xh2o is dissolved in 100ml, 20ml of which required 19.8ml of 0.1n hcl

Answer 1

XH2O is dissolved 100 ml of solution. The strength of the solution is therefore = 0.7/[1000/100] = 7 gL-1The molarity equation is written as n1M1V1 = n2M2V2 (1)where n1 is the acidity of Na2CO3, M1 is its molarity and V1 is the volume of sodium carbonate solution used.