Question

Calculate the molarity and mole fraction of 0.02 molal aqueous solution of naoh having Density 1.2g/ml

Answer 1

Given: mol of Noah is 0.02

density 1.2g/ml

ans: if 1 mol of Noah have 40 g weight

so 0.02 have 0.8 g weight

so volume=mass÷density

v=8÷12

molarity=no. of mol÷volume

M=0.02÷(8÷12)

molarity(M)=0.3