Question

Calculate the mass of NaOH required to make 0.40 L of a 0.50 M solution

Answer 1

8 gm

Step-by-step explanation:

NaOH molar weight = 22.989 + 15.999 + 1.008 = 39.996 gm

.5 M would contain 1/2 of this per liter = 19.998 gm

now you only want 400/1000 of a liter = 7.9992 gm ~ 8gm