Homework Help: CHEMISTRY

Posted by Mike on Sunday, September 23, 2012 at 6:44pm.

At what temperature do KCL and KNO3 have the same solubility

If a saturated solution of KNO3 at 20.0 C is heated to 80.0 how much more could be dissolved?

If a saturated solution of KCL at 90.0 C is colled to 30.0 C how much of the solid will precipitate?

How much NaCL will dissolve in 350.0 g of water at 70.0C

How much KCL Will dissolve in 50. g of water at 50.0C

What mass of O2 can be dissolved in 2000.0 g of water at 30.0 C

Please help me work these out. I am doing a practice page before my test 2morrow and I need to know how to work them THANKS

CHEMISTRY - DrBob222, Sunday, September 23, 2012 at 6:49pm
You must have information on the solubility at various temperatures. We need that to help you.
CHEMISTRY - Mike, Sunday, September 23, 2012 at 6:58pm
Um Alls the sheet gave me is this.. But are you talking about graphs?
CHEMISTRY - DrBob222, Sunday, September 23, 2012 at 7:09pm
A graph would do if but you must read the graph. We need the solubility of KNO3 and KCl but if you have a graph all you need to do is read that first one off the graph. At what T on the graph is the solubility of KCl and KNO3 the same. The solubility curves should intersect at that point. In fact I think all of these can be read from the graph.
CHEMISTRY - Mike, Sunday, September 23, 2012 at 7:18pm
Oh okay THANKS SO MUCH!

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