CHEM 24112 Chapter Notes - Chapter 15: Sodium Chloride, Ammonium Chloride, Ammonium Nitrate
Homework 15.2: Mass Percent
1. A solution that is 9% by mass glucose contains 9 g of glucose in every _____________ g of solution.
2. Calculate the percent by mass of solute in each of the following solutions.
a. 5.15 g of ammonium chloride dissolved in 15.0 g of water
b. 5.15 g of ammonium chloride dissolved in 39.2 g of water
c. 5.15 g of ammonium chloride dissolved in 125 g of water
d. 5.15 g of ammonium chloride dissolved in 125 mg of water
3. Calculate the mass, in grams, of solute present in each of the following solutions.
a. 225 g of 2.91% ammonium nitrate solution
b. 225 mg of 2.91% ammonium nitrate solution
c. 100. g of 4.95% potassium bromide solution
d. 1.00 kg of 4.95% potassium bromide solution
4. A laboratory assistant prepared a potassium chloride solution for her class by dissolving 5.34 g of
KCl in 152 g of water. What is the mass percent of the solution she prepared?
5. A sample of brass contains 71.2 g copper, 28.7 g zinc, and 1.03 g tin. Calculate the percentage of
each component present in the brass sample.
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