Question

200 ml of a solution of MgCO3 contains 21 g of
MgCoz. If 25 ml of this solution is diluted to
1250 ml. What is the molarity of the resulting
solution?​

Answer 1

Answer:

Explanation:

100

Answer 2

Answer:

Molar mass of Magnesium carbonate is : 84

Moles of Magnesium carbonate in 250 ml is :

21 / 84 = 0.25 moles

Moles in 25 ml is :

(25 / 250) × 0.25 = 0.025 moles

These moles will be in 1250 ml

The molarity of the resulting solution is thus :

(1000 / 1250) × 0.025 = 0.02 M