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siustrulka
wrote...
6 years ago
 Fractional Crystallization 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 Celsiusa. How much KNO3 remains in solution (see figure 1 http://img36.imageshack.us/i/pichj.png/)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? Rated Read 37360 times 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 info_answer.pdf (35.63 KB)
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toni_malvina
wrote...
6 years ago
 structure of cells
wrote...
Educator
6 years ago
 Is this problem solved? Please mark it as solved.
ricecooker22
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wrote...
6 years ago
 i assume it is solved? i am neew and can not tell if it is marked as solved
wrote...
Educator
6 years ago
 Quote from: lacadasical (6 years ago)i assume it is solved? i am neew and can not tell if it is marked as solvedHasn't been marked as solved yet...
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wrote...
Valued Member
6 years ago
 Does this help ? Attached file Thumbnail(s):
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wrote...
Staff Member
6 years ago
 Quote from: robertling (6 years ago)Does this help ?He needs 2 (D).
kim0608
 - 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
 Quote from: alease (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 ...
wrote...
5 years ago
 Quote from: biolove (5 years ago)Quote from: alease (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 ...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?
 123 New Topic