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Molarity Review

Molarity Review. 4-21-09. Problem #1. What is the Molarity of a solution that has a volume of 1.0L and contains 2.0 mols of NaCl ?. 2.0 mols 1.0 L. = 2 M. Problem #2. What is the Molarity of a solution that has a volume of 1.4L and contains 4.8 mols of CuSO 4 ?. 4.8 mols 1.4 L.

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Molarity Review

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  1. Molarity Review 4-21-09

  2. Problem #1 What is the Molarity of a solution that has a volume of 1.0L and contains 2.0 mols of NaCl? 2.0 mols 1.0 L = 2 M

  3. Problem #2 What is the Molarity of a solution that has a volume of 1.4L and contains 4.8 mols of CuSO4? 4.8 mols 1.4 L = 3.43 M

  4. Problem #3 What is the Molarity of a solution that has a volume of 4.5L and contains 9.3 mols of KCl? 9.3 mols 4.5 L = 2.07 M

  5. Problem #4 What is the Molarity of a solution that has a volume of 5.4L and contains 7.5 mols of Na2O? 7.5 mols 5.4 L = 1.39 M

  6. Problem #5 What is the Molarity of a solution that has a volume of 400mL and contains 3.1 mols of HCl? 3.1 mols | 400 mL | 1000 mL | 1 L | = 7.75 M

  7. Problem #6 What is the Molarity of a solution that has a volume of 250mL and contains 4.7 mols of KMnO4? 4.7 mols | 250 mL | 1000 mL | 1 L | = 18.8 M

  8. Problem #7 What is the Molarity of a solution that has a volume of 100mL and contains 6.2 mols of HF? 6.2 mols | 100 mL | 1000 mL | 1 L | = 62 M

  9. Problem #8 What is the Molarity of a solution that has a volume of 500mL and contains 5.9 mols of CuS? 5.9 mols | 500 mL | 1000 mL | 1 L | = 11.8 M

  10. Problem #9 What is the Molarity of a solution that has a volume of 1.3L and contains 40 grams of HCl? 40 g HCl | 1.3 L | 1 mol HCl | 36.46 g HCl | = 0.84 M

  11. Problem #10 What is the Molarity of a solution that has a volume of 2.3L and contains 75 grams of KCl? 75 g HCl | 2.3 L | 1 mol KCl | 74.55 g KCl | = 0.44 M

  12. Problem #11 What is the Molarity of a solution that has a volume of 3.6L and contains 89 grams of CuSO4? 89 g CuSO4| 3.6 L | 1 mol CuSO4| 159.61 g CuSO4| = 0.15 M

  13. Problem #12 What is the Molarity of a solution that has a volume of 4.5L and contains 27 grams of KMnO4? 27 g KMnO4| 4.5 L | 1 mol KMnO4| 158.04 g KMnO4| = 0.04 M

  14. Problem #13 What is the Molarity of a solution that has a volume of 200 mL and contains 25 grams of LiCl? 25 g LiCl | 200 mL | 1000 mL | 1 L | 1 mol LiCl | 42.39 g LiCl | = 2.95 M

  15. Problem #14 What is the Molarity of a solution that has a volume of 250 mL and contains 80 grams of HCl? 80 g HCl | 250 mL | 1000 mL | 1 L | 1 mol HCl | 36.46 g HCl | = 8.78 M

  16. Problem #15 What is the Molarity of a solution that has a volume of 100 mL and contains 54 grams of KMnO4? 54 g KMnO4| 100 mL | 1000 mL | 1 L | 1 mol KMnO4| 158.04 gKMnO4| = 3.42 M

  17. Problem #16 What is the Molarity of a solution that has a volume of 500 mL and contains 100 grams of CuSO4? 100 gCuSO4| 500 mL | 1000 mL | 1 L | 1 mol CuSO4| 159.61 gCuSO4| = 1.25 M

  18. Problem #17 How many grams of CuSO4 should be added to make a 400mL flask of a 4.2 M solution? mol CuSO4 400mL | | 1 L | 1000 mL | 4.2 | 1 L| 159.61 gCuSO4| 1 mol CuSO4| = 268.14 g of CuSO4

  19. Problem #18 You obtain 250 mL of a 6 M solution of HCl. How many mL are in the final volume of a 5 M solution of HCl? M1V1 = M2V2 (6M) (250mL) = (5M) (?mL) (1500) = (5) (?mL) Divide by 5 on both sides mL = 300

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