Concentration Practice
– show all your work as a group, everyone must know how to solve the problems because 1 person will be selected to
demonstration your problem solving.
1. How many grams of CuSO4  5H2O do you need to make 800. mL of a 0.6 M solution?
2. How many grams of NaOH are in 400.0 mL of a 0.5 M solution of NaOH?
3. We need 850.0 mL of a 0.45 M solution of NaHCO3. How much NaHCO3 do we weigh?
4. What is the molality of a solution prepared by dissolving 225 mg of glucose (C6H12O6) in 5.00 mL of ethanol (density = 0.789
g/mL)
5. Calculate the molality of a solution prepared by dissolving 125 mL of pure methanol (density = 0.791 g/mL) into 275 g of ethanol.
6. What is the mass percent of solute when 4.12 g is dissolved in 100.0 g of water?
7. Convert 0.0035% NaCl by mass into parts per million of NaCl.
Concentration Practice
– show all your work as a group, everyone must know how to solve the problems because 1 person will be selected to
demonstration your problem solving.
1. How many grams of CuSO4  5H2O do you need to make 800. mL of a 0.6 M solution?
2. How many grams of NaOH are in 400.0 mL of a 0.5 M solution of NaOH?
3. We need 850.0 mL of a 0.45 M solution of NaHCO3. How much NaHCO3 do we weigh?
4. What is the molality of a solution prepared by dissolving 225 mg of glucose (C6H12O6) in 5.00 mL of ethanol (density = 0.789
g/mL)
5. Calculate the molality of a solution prepared by dissolving 125 mL of pure methanol (density = 0.791 g/mL) into 275 g of ethanol.
6. What is the mass percent of solute when 4.12 g is dissolved in 100.0 g of water?
7. Convert 0.0035% NaCl by mass into parts per million of NaCl.
Concentration Practice
– show all your work as a group, everyone must know how to solve the problems because 1 person will be selected to
demonstration your problem solving.
1. How many grams of CuSO4  5H2O do you need to make 800. mL of a 0.6 M solution?
2. How many grams of NaOH are in 400.0 mL of a 0.5 M solution of NaOH?
3. We need 850.0 mL of a 0.45 M solution of NaHCO3. How much NaHCO3 do we weigh?
4. What is the molality of a solution prepared by dissolving 225 mg of glucose (C6H12O6) in 5.00 mL of ethanol (density = 0.789
g/mL)
5. Calculate the molality of a solution prepared by dissolving 125 mL of pure methanol (density = 0.791 g/mL) into 275 g of ethanol.
6. What is the mass percent of solute when 4.12 g is dissolved in 100.0 g of water?
7. Convert 0.0035% NaCl by mass into parts per million of NaCl.
Concentration Practice
– show all your work as a group, everyone must know how to solve the problems because 1 person will be selected to
demonstration your problem solving.
1. How many grams of CuSO4  5H2O do you need to make 800. mL of a 0.6 M solution?
2. How many grams of NaOH are in 400.0 mL of a 0.5 M solution of NaOH?
3. We need 850.0 mL of a 0.45 M solution of NaHCO3. How much NaHCO3 do we weigh?
4. What is the molality of a solution prepared by dissolving 225 mg of glucose (C6H12O6) in 5.00 mL of ethanol (density = 0.789
g/mL)
5. Calculate the molality of a solution prepared by dissolving 125 mL of pure methanol (density = 0.791 g/mL) into 275 g of ethanol.
6. What is the mass percent of solute when 4.12 g is dissolved in 100.0 g of water?
7. Convert 0.0035% NaCl by mass into parts per million of NaCl.