Solving a Solubility Problem: Ba(NO3)2 Crystallisation

[elliotyang]

Homework Statement

Given solubility of Ba(NO₃)₂ is
34g/100 H₂0 at 100^oC
5g/100g of H20 AT 0^oC
if one starts with 100g of (BaNO₃)₂ and make a saturated solution in water at 100^oC, and then cooled to 0^oC, how much Ba(NO₃)₂ is crystallised out of solution?
The resultant crystals carry along with them on surface 4g of H₂0 per 100g of the crystals.

Homework Equations

input=output

The Attempt at a Solution

Initial the concentrated solution would be 100g/300g H₂0 if i do not calculate wrongly.
then how should i proceed?

 

[Borek]

You have 100g/300g initially. Once you cool down the solution - amount of water won't change, amount of dissolved salt will. How much salt will be dissolved in 300g of water at 0ºC?