C16HW - Ch 16, supplementary problems. Here are some...

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Ch 16, supplementary problems. Here are some additional problems for Ch 16. They are mainly on weight percentage and on dilutions. (If you want more, see my self-help worksheets on these topics, at the web site.) In all questions here, assume that given ambiguous zeroes are significant. (That is, take “200 mL” as 3 sig fig.) Answers are below; complete set-ups are shown for some problems. 1. Calculate the concentration of each of the following solutions, in % by weight, %(w/w): a. 24 g of sugar in 135 g of solution. b. 24 g of sugar dissolved in 135 g of water. 2. a. You dissolve 12.5 g of sodium chloride in 100 g of water. What is the concentration of this solution, in %(w/w)? b. You dissolve 12.5 g of potassium chloride in 100 g of water. What is the concentration of this solution, in %(w/w)? c. In part a, what would be different (or what would you do differently) if the amount of solvent were given as 100 mL? 3. The parts here refer to a 15% (w/w) sugar solution.
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C16HW - Ch 16, supplementary problems. Here are some...

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