# 10 chemistry 1 questions

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1. Calculate the mass percent of solute in the following solutions.

2.37 g KCl dissolved in 49.1 g H2O

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28.3 g KNO3 dissolved in 853 g H2O

2. You need to dissolve CaCl2 in water to make a mixture that is 30.5% calcium chloride by mass. If the total mass of the mixture is 423.5 g, what masses of CaCl2 and water should be used?

Mass of CaCl2

Mass of water

3. Calculate the molarity of the two solutions.

a) 0.200 mol of NaOH in 1.70 L of solution.

b) 14.3 g of NaCl in 889 mL of solution.

4. How many moles of NaOH are present in 15.0 mL of 0.320 M NaOH?

5. If 3.59 g of CuNO3 is dissolved in water to make a 0.750 M solution, what is the volume of the solution?

6. How many grams of solute are present in 525 mL of 0.410 M KBr?

7. You have 37.0 mL of a 0.400 M stock solution that must be diluted to 0.100 M. Assuming the volumes are additive, how much water should you add?

8. How many milliliters of 10.0 M HCl(aq) are needed to prepare 765.0 mL of 1.00 M HCl(aq)?

9. What is the concentration of a solution made by diluting 65 mL of 6.0 M HCl to a final volume of 750 mL?

10. You see a bottle of NaOH labeled 0.015 M. What is the pH?

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