Answer to Question #127294 in Organic Chemistry for Kama

Question

4g of CaCl2 is dissolved in a 200cm^3 of a solution. Find the Molarity of CaCl2in the solution

Answer 1

Molarity = moles/vol.of soln. in litre

In 4 gm. CaCl₂

No. Of moles = 4/111 (mol.wt.of CaCl₂is 111)

1Cm³ = 1ml.

Molarity of CaCl₂ = (4*1000)/(111*200)

= 20/111

= 0.180 moles / litre