# Homework Help: Freezing point depression

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1. Oct 13, 2008

### magma_saber

1. The problem statement, all variables and given/known data
One mole of two different compounds happens to weight the same, but one compound ionizes in water and the other does not. Which will give the lowest freezing point depression?

2. Relevant equations

3. The attempt at a solution

2. Oct 14, 2008

### Staff: Mentor

You just don't ask. You try, you tell us what you did, we push you in the right direction.

3. Oct 14, 2008

### magma_saber

first of all what does lower freezing point depression mean? does it mean the lower freezing point?

4. Oct 14, 2008

### Staff: Mentor

Water freezes at 0°C. Imagine that when you dissolve one of these substances water freezes at -1°C, if you dissolve the other - water freezes at -2°C. Difference between 0 and the actual freezing point is called freezing point depression, in this case it will be 1 or 2 degrees depending on the substance.

But you should know it all, if you are asked this question.