Question

James performed an experiment to see how adding different salts to water affects their freezing points. His data is shown below.
Concentration of Salt Solution
(mol solute/kg water) Freezing Point for
NaCl Solution Freezing Point for
MgCl2 Solution
0 0°C 0°C
2 -2.5°C -2.8°C
4 -6.0°C -7.5°C
6 -11.0°C -15.0°C
8 -16.5°C -35.0°C
How are the freezing points related to the concentrations of the salt solutions?

Answer 1

For both salt solutions, as the concentrations increase, the freezing points increase.

For the NaCl solution only, as the concentrations increase, the freezing points increase.

For both salt solutions, as the concentrations increase, the freezing points decrease.

For the MgCl2 solution only, as the concentrations increase, the freezing points decrease.

Answer 2

Since both freezing points become more negative as the dosage increases, they are decreasing. So C.

Answer 3

If you wanted to, you could plug in two points to find the slope of each solution. Negative would be decreasing and positive would be increasing.

Answer 4

which one is the answer?

Answer 5

C