Dilution Worksheet 1. Describe how you would prepare 2.00 L of 0.100 M K2CrO4 from 1.75 M K2CrO4 stock solution. 2. 50.00 mL of concentrated nitric acid (16M HNO3) is diluted to 1.000 L. What is the concentration of the new solution? 3. A solution is prepared by dissolving 10.8 g ammonium sulfate in enough water to make 100.0 mL stock solution. A 10.00-mL sample of this stock solution is then placed in a 50.00-mL volumetric flask and diluted to the mark with water. What is the molarity of the new solution? 4. 30.00 mL of water is added to 20.00 mL of 0.0500 M sodium carbonate. What is the molarity of sodium ions in the new solution? 5. If I have 340 mL of a 0.5 M NaBr solution, what will the concentration be if I add 560 mL more water to it? 6. If I dilute 250 mL of 0.10 M lithium acetate solution to a volume of 750 mL, what will the concentration of this solution be? 7. If I leave 750 mL of 0.50 M sodium chloride solution uncovered on a windowsill and 150 mL of the solvent evaporates, what will the new concentration of the sodium chloride solution be? 8. An experiment requires 2.00 L of 0.200 M hydrochloric acid (HCl) solution. What volume of concentrated hydrochloric acid, containing 11.9 M hydrogen chloride, is needed? 9. A chemist adds water to 120 mL of a 6.0 M solution of NaOH until the final volume is 2.0 L. What is the molarity of the resulting solution? 10. What concentration results when 150 mL of a 0.36 M solution of magnesium sulfate, MgSO4, are added to enough water to give a final solution volume of 750 mL? 11. What concentration results when 150 mL of a 0.36 M solution of magnesium sulfate, MgSO4, are added to 750 mL of water? 12. Describe how you would prepare 250.0 mL of a 1.00 M NaOH solution.