Homework Help: chem

Posted by Mischa on Wednesday, October 15, 2008 at 8:04pm.

The solubility of KNO3 is 155 g per 100 g of water at 75 degrees celcius and 38.0 g at 25 degrees celcius. What mass (in grams) of KNO3 will crystallize out of solution if exactly 100 g of its saturated solution at 75 degrees celcius is cooled to 25 degrees celcius.

i found that 60.8 g KNO3 is in the solution at 75degrees, and 27.5 g KNO3 at 25degrees. so 33.3 g would crystallize, but the right answer is 45.9 g. Not sure how to do the problem then...

chem - Mischa, Wednesday, October 15, 2008 at 8:09pm
ever mind...i got it.

Answer this Question

Related Questions

Chemistry - Assuming complete dissociation of the solute, how many grams of KNO3...
chemistry - we add 100 ml of water at 20 degrees celcius to 10g of an unknown ...
College Chem 1 - a chemistry handbook lists the solubility of NaI as 184 per ...
chemistry - The particles of which sample of LiCl(s) have the same average ...
Math - An object is heated to 90 degrees Celcius and is then allowed to cool in ...
Math - An object is heated to 90 degrees Celcius and is then allowed to cool in ...
Math - An object is heated to 90 degrees Celcius and is then allowed to cool in ...
Chemistry 1 HN - Find the mass of iron heated to 85 degrees celcius that was ...
Chemistry - Given: solubility (g/100g H2O) temp degrees celcius KBR 20 65 40 80 ...
physics - You have a bathtub containing 100 ml of water at 25 degrees celcius. ...

For Further Reading

First Name:
School Subject:
Answer: