Question

How many grams of naoh should be added in 100 ml to get 2m naoh aqueous aolution ?

Answer 1

let n be the no. of moles of NaOH.
let m be the mass of naoh

So,, Molarity= [n/v (ml)]×1000
; 2= (n/100)×1000
n=0.2

and n =m/ molar mass
0.2= m/40
m= 0.2×40
m = 8 grams