Posted by Katy on Thursday, September 29, 2011 at 1:18am.
You don't have enough information posted to work the problem. Here is what you do.
Look at your procedure and calculate the grams of product you expect to make assuming 100% for the reaction. Then multiply 0.18 x (volume you expect/100) and subtract from the product you expect to have. Finally, the amount left/amount expectedt)*100 = maximum recovery you can expect. You won't get that because the reaction won't be 100%. The idea is that if the solubility is 0.18 g/100 mL, you will lose that much per 100 mL during recrystallization (if just one recryst is done). If you expect to recrystallize more than once, you will lose that much each time.
I've had second thoughts about this. Although I think my initial response is correct, I believe we can approach it another way much simpler.
If we take a 2.35g sample, we can dissolve it in 100 mL water. If we then crystallize it at ice cold temperature, 0.18g of it will be lost. So the amount recovered is 2.35-0.18 =2.17g
%recovery = (2.17/2.35)*100 = x or about 92%
Related Questions
organic Chemistry - In my Organic chemistry lab, the calculated enantiomeric ...
Reading - Rosalind Wiseman books Terra Elan McVoy books Susane Colasanti books ...
math - lizette wants to read more books. her goal is to read at least 2 books ...
Chemistry - Tell me a website from where i can get full information regarding ...
Chemistry - I have to write the exact lewis electron dot structure for para ...
Chemistry - HELP IGCSE - I have a chemistry exam tomorrow and I don't get ...
chemistry - How do you make a venn diagram of the 6 branches of chemistry? (...
Organic Chemistry - I realize this is a general chemistry stoichiometry question...
Chemistry - Problem: A gaseous mixture of O2 and Kr has a density of 1.181 g/L ...
Math - If you pass general chemistry, then you can take organic chemistry. You ...
For Further Reading
