Determine the freezing point of a 0.51 molal solution of benzoic acid in chloroform. chloroform has a freezing point of -63.5°c and a freezing point depression constant of 4.70°c•kg/mol. what is the freezing point of this solution? °c

-65.897°C.

Explanation:

ΔTf = Kf.m,

where, ΔTf is the depression in freezing point.

Kf is the molal depression constant of water (Kf = 4.70°C/m).

m is the molality of the solution (m = 0.51 m).

∴ ΔTf = Kf.m = (4.70°C/m)(0.51 m) = 2.397°C.

∴ The freezing point of the solution = freezing point of pure chloroform - ΔTf = -63.5°C - 2.397°C = -65.897°C.

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.

1.solid

2.carbon dioxide

3.helium