Question

The density of 3 molal solution of NAOH is 1.110 gm/ml.Calculate the molarity of the solution.....

Answer 1

solution

Total mass of NaOH= 23+ 16+ 1

= 38

molarity= 1.110/38= 0.28 mol

Answer 2

Molality =(molarity)/(density *molar mass)
Let molarity be x
3= x/(1.11*40)
On solving the equation
x =133.2
Molarity = 133.2 M