Posted by kate on Friday, May 29, 2009 at 9:02am.
If 20 g KCL is dissolved in 100g of water at 20 degrees C, is the solution unsaturated, saturated, or supersaturated?
- chemistry - PC, Friday, May 29, 2009 at 9:10am
If you google "potassium chloride Wiki", you will find somewhere the solubility of KCl as 34.4 g/100 ml. of water at 20 degrees C.
Refering to your previous question on saturated solution, you will find a definition of solubility, you should be able to tell if 20 g of KCl in 100 g of water is unsaturated or saturated.
Recall that the definition of
"A solution in which the maximum amount of solvent has been dissolved."
Note: water weighs (almost exactly) 1 g per ml.
- chemistry - kate, Friday, May 29, 2009 at 9:30am
so it is unsaturated
- chemistry - bobpursley, Friday, May 29, 2009 at 9:42am
- chemistry - kate, Friday, May 29, 2009 at 9:56am
i think it is saturated
- chemistry - bobpursley, Friday, May 29, 2009 at 10:04am
I think you are not reading the graph, and are guessing. You are wrong.
- chemistry - PC, Friday, May 29, 2009 at 11:04am
You'd have to read the graph, but concentrate on the line that says KCl. The x-axis represents the temperature, and the y-axis represents the maximum number of grams of solute (KCl) that dissolves in water. This value represents the saturation point. Any solution containing less than this quantity is unsaturated.
Now, can you give it another try?
- chemistry - kate, Friday, May 29, 2009 at 1:47pm
- chemistry - PC, Friday, May 29, 2009 at 4:47pm
- chemistry-PC - bobpursley, Friday, May 29, 2009 at 4:48pm
PC: email me if you are interested in becoming a regular volunteer teacher.
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