1 Honors Chemistry Name _______________________ Concentrations of Solutions Date ________________________ Complete the following problems on a separate sheet of paper. Use significant figures. Note: The density of water is 1 g/mL. 1. What is the molarity of a solution that contains 10.0 grams of Silver Nitrate that has been dissolved in 750 mL of water? 10.0 ! 1 1 ! 169.872 ! = 0.0588678 ! = () = 0.0588678 ! 0.75 = 0.078 ! 2. You want to create a 0.25 M Potassium Chloride solution. You mass 5.00 grams of Potassium Chloride. How much water is needed? 5.00 1 1 74.551 = 0.067068 = β = = 0.067068 0.25 = 0.27 = 270 3. What is the molality of a solution that contains 48 grams of sodium chloride and 250 mL of water? 48 1 1 58.443 = 0.8213 250 ! 1 1 ! 1 ! 1 ! 1000 ! = 0.25 ! = = 0.8213 0.25 ! = 3.3 4. What is the percentage by mass of the solution from problem 1? 750 ! 1 1 ! 1 ! = 750 ! = 100 = 10.0 ! 10.0 + 750 100 = 1.32 ! 5. How many mL of hydrogen peroxide are needed to make a 8.5% solution by volume of hydrogen peroxide if you want to make 450 mL of solution? = 100
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Honors Chemistry Name _______________________ Concentrations of Solutions Date ________________________ Complete the following problems on a separate sheet of paper. Use significant figures.
Note: The density of water is 1 g/mL.
1. What is the molarity of a solution that contains 10.0 grams of Silver Nitrate that has been dissolved in 750 mL of water?
