A3.20 g sample of a salt dissolves in 9.10 g of water to give a saturated solution at 25°c. a. what is the solubility (in g salt/100 g of water) of the salt? b. how much water would it take to dissolve 25 g of this salt? c. if 10.0 g of this salt is mixed with 15.0 g of water, what percentage of the salt dissolves?

Explanation:

We know that 3.20 grams of salt in 9.10 grams of water gives us a saturated solution at 25°C. To find how many grams of salt will gives us a saturated solution in 100 grams of water at the same temperature, we can use the rule of three.

Working it a little this gives us :

So, the solubility of the salt is 35.16 (g/100 g of water).

Using the rule of three, we got:

Working it a little this gives us :

So, it would take 71.09 grams of water to dissolve 25 grams of salt.

Using the rule of three, we got that for 15.0 grams of water the salt dissolved will be:

Working it a little this gives us :

This is the salt dissolved

The percentage of salt dissolved is: