Question

Calculate the molarity of a solution obtained dissolving 15.0 g of cobalt(Ⅱ) bromide dihydrate in enough water to make 225 mL of solution

Answer 1

Molarity= 0.305M

Step-by-step explanation:

m=15g, Molar mass of CoBr2= 218.7

V=0.225dm3, C=?

Moles = m/M= C×V

Substitute and Simplify

m/M= C×V

15/218.7= C×0.225

C= 0.305M