1) 15 g of NaClis dissolved in 225g of water. What is the mass percent of NaCl in the solution?
2) Marco bought 15mL of kerosene and diluted it with 55 mL of water. What is the percent by volume of the water?
3) What is the percent by mass of a solution that contains 589 NaCl dissolved in 150 g of water?
4) What is the percent by volume of a 125 ml of liquid milk added to 450 ml of water?
5) A solution is made by adding 25 mL of benzene to 80 mL of toluene. What is the percent by volume of benzene?
Answers
Answer:
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Given - Variable data about solution
To find - Mass percent and volume percent as per question
Solution - 1. Mass of solute : 15 gram
Mass of solvent : 225 gram
Mass of solution = 15 + 225
Mass of solution = 240 gram
Mass percent of solution = 15/240*100
Mass percent of NaCl in solution = 6.25%
2. Volume of solute : 15 ml
Volume of solvent : 55 ml
Volume of solution = 15 + 55
Volume of solution = 70 ml
Percent by volume of water = 55/70*100
Percent by volume of water = 78.57%
3. Mass of solute : 589 gram
Mass of solvent : 150 gram
Mass of solution = 589 + 150
Mass of solution = 739 gram
Mass percent of solution = 589/739*100
Mass percent of NaCl in solution = 79.7%
4. Volume of solute : 125 ml
Volume of solvent : 450 ml
Volume of solution = 125 + 450
Volume of solution = 575 ml
Percent by volume = 125/575*100
Percent by volume = 21.7%
5. Volume of benzene : 25 ml
Volume of toluene : 80 ml
Volume of solution = 25 + 80
Volume of solution = 105 ml
Percent by volume of benzene = 25/105*100
Percent by volume = 23.8%