What temperature is necessary in order to dissolve twice as much fo these solids in 100cm3 of water as can be dissoved at 20gC.

Question

a. sodium nitrate
b. potassium nitrate
c. sodium choride

Answer 1

http://www.buhs.k12.vt.us/science/physicalscience/Lab%20images/0009-004-sol-v-t.gif

I will be happy to critique your solution.