EXTRA CREDIT: Molarity and Dilution Problems
You must show all your work and complete all problems in order to receive extra-credit.
1. Sea water contains roughly 28.0 g of NaCl per liter. What is the molarity of sodium chloride in sea water?
2. What is the molarity of 245.0 g of H2SO4 dissolved in 1.50 L of solution?
3. What is the molarity of 95.30 g of Na2CO3 dissolved in 400.0 mL solution?
4. What is the molarity of 355.00 g of NaOH in 750.0 mL of solution?
5. What is the molarity of 4.67 moles of Li2SO3 dissolved to make 2.04 liters of solution?
6. What is the molarity of 0.629 moles of Al2O3 to make 1.500 liters of solution?
7. What is the molarity of 478.3 grams of Na2CO3 dissolved to make 10.00 liters of solution?
8. What is the molarity of 89.7 grams of (NH4)2CO3 dissolved to make 250 mL of solution?
9. What is the molarity of 0.0348 grams of PbCl2 dissolved to form 45.0 mL of solution?
10. How do you prepare a 250.0-mL of a 2.35 M HF dilution from a 15.0 M stock solution?
11. If 455-mL of 6.0 M HNO3 is used to make a 2.5 L dilution, what is the molarity of the dilution?
12. If 65.5 mL of HCl stock solution is used to make 450.-mL of a 0.675 M HCl dilution, what is the molarity of the stock solution?
13. How do you prepare 500.-mL of a 1.77 M H2SO4 dilution from an 18.0 M H2SO4 stock solution?
14. How many moles of LiF would be required to produce a 2.5 M solution with a
volume of 1.5 L?
15. How many moles of Sr(NO3)2 would be used in the preparation of 2.50 L of a 3.5 M solution?
16. What is the molarity of a 500-mL solution containing 249 g of KI?
17. How many grams of CaCl2 would be required to produce a 3.5 M solution with a
volume of 2.0 L?