What is the expected freezing point of a 0.50 m solution of li2so4 in water? kf for water is 1.86 ∘c/m.

-2.79°C is the expected freezing point of a 0.50 m solution of lithium sulfate.

Explanation:

Freezing point of water = T =0°C

Melting point of sample =

Depression in freezing point =

Depression in freezing point  is also given by formula:

= The freezing point depression constant

m = molality of the sample

i = van't Hoff factor  

We have: = 40°C kg/mol

m = 0.50 m

i = 3 (lithium sulfate is an ionic compound)

-2.79°C is the expected freezing point of a 0.50 m solution of lithium sulfate.

it's c (engineer's do their work with mechanical stuff not on any living being)