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siustrulka
wrote...
6 years ago
1d. determine the number of grams of water required at 100 Celsius to dissolve a mixture containing 20 g KNO3 and 2.0 g CuSO4*5H20 assuming that the solubility of one substance is not affected by the presence of another.

2. to the solution in Problem 1d at 100 Celsius, 15g of water are added and the solution is cooled to 0 Celsius

a. How much KNO3 remains in solution (see figure 1 )
b. How much KNO3 crystallizes out?
c. How much CuSO4*5 H2O crystallizes out?
d What percent of the KNO3 in the sample is recovered?
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29 Replies
wrote...
Valued Member
6 years ago
To solve this problem, you need the solubilty data of KNO3 in water from 0 to 100 C. To determine mass which crystallizes out, subtract the solubility of KNO3 at the lower temperature from that at the higher temperature.

I think the following writeup may help you
Attached file
toni_malvina
wrote...
6 years ago
structure of cells
wrote...
Administrator
6 years ago
Is this problem solved? Please mark it as solved.
✓ Don't be mean, we need followers on Twitter too! Slight Smile
wrote...
5 years ago
i assume it is solved? i am neew and can not tell if it is marked as solved
wrote...
Administrator
5 years ago
i assume it is solved? i am neew and can not tell if it is marked as solved

Hasn't been marked as solved yet...
✓ Don't be mean, we need followers on Twitter too! Slight Smile
wrote...
Valued Member
5 years ago
Does this help Undecided ?
Attached file
Thumbnail(s):
Don't forget to give me a thumbs up!
wrote...
Staff Member
5 years ago
Does this help Undecided ?

He needs 2 (D).
- Master of Science in Biology
- Bachelor of Science (Biology)
- Bachelor of Education
wrote...
5 years ago
add the first amount of water (in grams) to the added amount of water and multiply by .1 (because 10g/100ml) then subtract that amount from the given amount...that is your amount of KNO3 crystallized.
wrote...
5 years ago
What percent of KNO3 in the sample is recovered?
wrote...
5 years ago
subtract to find out the precipitate
wrote...
5 years ago
This problem is confusing to all of the chem students.... our values are different though.
wrote...
Donated
Trusted Member
5 years ago
This problem is confusing to all of the chem students.... our values are different though.

What did you get? Could you show us the solution Undecided...
wrote...
5 years ago
This problem is confusing to all of the chem students.... our values are different though.

What did you get? Could you show us the solution Undecided...

Our problem looks like the thumbnail from the first page, but we don't even know where to start on part two! Do you have any  idea how to work this problem out?
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