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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: Bob42 on April 14, 2008, 03:50:44 PM

Title: solubility in water at various temperatures
Post by: Bob42 on April 14, 2008, 03:50:44 PM

Hello, I'm having trouble with completing my homework assignment. I've attached the assignment to this post.

I was able to figure out the first question, but the other two I'm stumped on. I just need help with figuring out the formula for completing these problems. I'm pretty sure I can solve them if I have the formula.

Title: Re: solubility in water at various temperatures
Post by: Borek on April 14, 2008, 03:58:00 PM

There is no special formula, but everything you need is in the table.

How much KCl is dissolved in 100.0g of water at 20 deg C?

How much KCl can be dissolved in 100.0g of water at 50 deg C?

Title: Re: solubility in water at various temperatures
Post by: Bob42 on April 14, 2008, 04:13:27 PM

So the answer for #2 is 8.6g because 42.6 - 34 = 8.6
Does that same concept apply with #3?

Title: Re: solubility in water at various temperatures
Post by: Borek on April 14, 2008, 04:51:56 PM

Quote from: Bob42 on April 14, 2008, 04:13:27 PM

So the answer for #2 is 8.6g because 42.6 - 34 = 8.6
Does that same concept apply with #3?

Yes.