Arkansas State University Department of Chemistry and Physics

1.     What is the concentration (molarity) of a solution of NaCl if 40 mL of a 2.5 M NaCl solution is diluted to a total volume of 500 mL?

2.    What is the concentration of a solution of Fe(NO₃)₃ if 80 mL of a 3.0 M Fe(NO₃)₃ solution is diluted to a total volume of 1500 mL?

3.    What is the concentration of a solution of KOH if 75 mL of a 2.25 M KOH solution is diluted to a total volume of 250 mL?

4.    What is the concentration of a solution of CaSO₃ if 8.0 mL of a 1.0 M CaSO₃ solution is diluted to a total volume of 100 mL?

5.    How many mL of 6.0 M HCl is needed to make 250 mL of a 1.5 M HCl solution?

6.    How many mL of 12.0 M HCl is needed to make 250 mL of a 1.5 M HCl solution?

7.    How many mL of 4.0 M NaCl is needed to make 50 mL of a 0.5 M NaCl solution?

8.    How many mL of 2.0 M CrCl₃ is needed to make 400 mL of a 0.25 M CrCl₃ solution?

9.    How would you prepare 250 mL of a 6.0 M NaNO₃ solution from a 15 M NaNO₃ solution?

10.    How would you prepare 500 mL of a 1.0 M MgCl₂ solution from a 5.0 M MgCl₂ solution?

11.    Can you prepare a 6.0 M NaI solution from a 3.0 M NaI solution by dilution?

12.    Can you prepare a 6.0 M NaI solution from a 9.0 M NaBr solution by dilution?

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