Practice Expressing Concentration Of Solutions (1.2) - Solutions

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6 sample questions

Question 1.
What is mass percentage?
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Think about how much solute is compared to the total.
Question 2.
Explain what ppm stands for.
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Consider how many parts of solute are in a million parts of solution.
3Question 3.
What is the formula for calculating mass percentage?
- (mass of solute/total mass of solution)*100
- (volume of solute/total volume of solution)*100
- (moles of solute/volume of solution)
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Look for the option that discusses mass.
4Question 4.
True or False: Molarity can change with temperature.
- True
- False
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Consider how heating a liquid might affect its volume.
Question 5.
A 75 g mass of glucose is dissolved in enough water to make 500 mL of solution. Calculate the molarity and molality of this solution.
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Convert mL of water to kg for molality.
Question 6.
Using Raoult's Law, if the vapor pressure of pure solvent (A) is 100 mm Hg, and the mole fraction of A in a solution is 0.6, what is the vapor pressure of the solution?
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Remember that you multiply the mole fraction by the vapor pressure of pure solvent.

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