Question

Calculate the freezing point of a solution when 3g of cacl2 is dissolved in 100g of water

Answer 1

Explanation:

molality of MgCl2 => (1.9/95)*1000/50 = > 0.4

For complete ionization i that is vant Hoff factor is equal to the total no. of dissociated ions.

Therfore for MgCl2, i = 1 + 2 => 3

Freezing Point, deltaTf = 3*1.86*0.4 => 2.232.

Now freezing point => 0’ – 2.323’ => -2.32’C

Answer 2

Answer:

Explanation:

molality of MgCl2 => (1.9/95)*1000/50 = > 0.4

For complete ionization i that is vant Hoff factor is equal to the total no. of dissociated ions.

Therfore for MgCl2, i = 1 + 2 => 3

Freezing Point, deltaTf = 3*1.86*0.4 => 2.232.

Now freezing point => 0’ – 2.323’ => -2.32’C