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May 22, 2015

Homework Help: Chemistry(Please Check)

Posted by cateye on Monday, April 23, 2012 at 11:56am.

You dissolve 6.55 g of potassium nitrate in enough water to make a 250. ML solution.

1.What is the molarity of this solution?answer:0.0262

2.If you took out 15.0 mL of this solution, how many moles of potassium nitrate would you have?answer:0.393

3. What is the percent (m/v) of this solution?answer:0.0262

4.If the resulting solution has a density of 1.45 g/mL, what is the percent (m/m) of the solution?answer:0.0181

5.How does the freezing point of this solution compare with that of pure water?answer:should be lower

6.How does the boiling point compare?answer:it should be higher than that for pure water

7.If you added 1.25 L of additional water to this solution, what would the molarity of this new solution be?answer:.0432

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