Which of the follwing solution has the lowest freezing point?

Question

Which of the following solutions has the lowest freezing point?

a. 0.20 m (molal) glucose

b. 0.20 m NH2Br

c. 0.20 m ZnS04

d. 0.20 m I<.:.Mn04

e. 0.20 m MgC12

Answer 1

For MgCl2 : i = 3

delta T = 3 x 0.20 x 1.86 =1.12 °C

freezing point = - 1.12 °C