[artem.metelskiy]

a) the number of grams of KNO₃ that will dissolve in 100g of H₂O at 100C
b) the number of grams of water required to dissolve 20g of KNO₃ at 100C.
c) the number of grams of water required to dissolve 2g CuSO₄ at 100C.
d) the number of grams of water required at 100C to dissolve a mixture containing 20g KNO₃ and 2g CuSO₄
I need help how to get those solved by looking at picture. Can someone please explain to me. I appreciate it, thanks.

[Arkcon]

Do you think you can do part a for us?  What does it ask?  And how does that relate to the graph?

[artem.metelskiy]

For a) will it be 240g of KNO₃?

[opti384]

For a) will it be 240g of KNO3?

Yes. Now 100g of water are required to dissolve 240g of KNO3. Then how much water will be required to dissolve 20g of KNO3?

[artem.metelskiy]

For a) will it be 240g of KNO3?

Yes. Now 100g of water are required to dissolve 240g of KNO3. Then how much water will be required to dissolve 20g of KNO3?

Ok I think I figured out
b) 100gH₂O/240gKNO₃=x/20gKNO₃ -> x=8.33gH₂0 will dissolve 20g of KNO₃
c) 100gH₂O/180gCuSO₄=x/2gCuSO₄ -> x=1.11g of H₂0 will dissolve 2g of CuSO₄

But for d) would i just simply add 8.33 and 1.11?