Posted by Jared on .
195 g of water containing magnesium chloride boils at 102.5 celcuis. what mass of salt is needed?

Chemisty 
bobpursley,
Let me check you work on this. The bp elevation is 2.5C

Chemisty 
Jared,
the answer is 30.1 grams magnesuim chloride but i don't kknow how to get to the answer

Chemisty 
bobpursley,
bpeleveation=m*constant
m=2.5/1.86
now m=moles/kgwater=moles/.195
moles=mass/formulamassMgCl2
mass=formulamass*.195*2.5/1.85
check all that math.