Level 3: Molarity Calculations 3. How many grams of KCI are present in 75 mL of a 0.050M solution of KCI? 0.28 g 4. How many mL of .12 M solution of Na2SO4 are needed to deliver 10.0 g of solute? 590 mL 5. What is the molarity of 350 mL of solution containing 4.5g of NaCl? 6. How many g of lithium are present in a 76.5 mL sample of 1.5M lithium carbonate? evel 4: % concentration calculations 7. How many grams of water are present in 500.0 g of a 11.5 m/m% solution? 443 g 8. If a 4.5 v/v% solution contains 320.0 mL of ethanol, how many mL of solution are present? 9. How many mL of solution are present in a sample containing 50.0 g of solute if the solution is a 4.5 m/v% solution? 10. What is the m/m% of a solution which has 34.0 g of NaCl dissolved in 96.0 g of water? 26.2% Level 3: Molarity Calculations 3. How many grams of KCI are present in 75 mL of a 0.050M solution of KCI? 0.28 g 4. How many mL of .12 M solution of Na2SO4 are needed to deliver 10.0 g of solute? 590 mL 5. What is the molarity of 350 mL of solution containing 4.5g of NaCl? 6. How many g of lithium are present in a 76.5 mL sample of 1.5M lithium carbonate? Level 4: % concentration calculations 7. How many grams of water are present in 500.0 g of a 11.5 m/m% solution? 443 g 8. If a 4.5 v/v% solution contains 320.0 mL of ethanol, how many mL of solution are present? 9. How many mL of solution are present in a sample containing 50.0 g of solute if the solution is a 4.5 m/v% solution? 10. What is the m/m% of a solution which has 34.0 g of NaCl dissolved in 96.0 g of water 26.2% Level 5: Dilution 11. How many mL of water are needed to dilute 100.0 mL of a .500 M solution to .100 M 12. How many mL of 1.2 M stock solution are needed to make 150.0 mL of a .500M solution? 63 mL Additional practice: 13. What is the m/v% of 5.00 L of solution containing 35.0 g of solute? 0.700 m/v% 14. How many g of KCI are present in 79 mL of 2.35 M solution? 15. How many mL of water are present in a 3.4 v/v% solution which contains 9.00 mL of ethanol?