Review the following concepts if needed - Stoichiometry and Chemical Solutions Study Guide
Practice Questions
| 1. | Calculate the molarity of a solution prepared by adding 45.2 g of solid NaOH to 250 mL of water. |
| 2. | Calculate the number of grams of NaOH needed to make a 350 mL solution of a 3.0 M NaOH solution. |
| 3. | Calculate the normality of a solution of 0.56 moles of ethanol in 250 g of water. |
| 4. | How many moles of ethanol are needed to make a 1.2 kg, 2.1 m solution? |
| 5. | Calculate the normality of a solution of 2.56 moles of H2SO4 in 250 mL of water. |
| 6. | How many moles of H3PO4 is needed to make 250 mL of 2.5 N H3PO4(aq)? |
| 7. | How much 15.0 M HNO3 is needed to make 1.5 liters of 1.0 M HNO3? |
| 8. | Calculate the molarity of a solution prepared by combining 450 mL of water with 20 mL of concentrated HCl (12 M). |
| 9. | How much 19.2 M NaOH is needed to make 1.5 liters of 1.0 M NaOH? |
| 10. | Exactly 25.46 mL of 0.125 M NaOH was titrated to the equivalence point with 25.0 mL of an unknown concentration of HCl. Calculate the molarity of the HCl solution. |
| 11. | What volume of 2.00 M HNO3 will react completely with 25.0 mL of 6.00 M NaOH? |
| 12. | What volume of 6.00 M KOH will react completely with 25.0 mL of 6.00 M H2SO4? (Hint: The sulfuric acid has two protons that can react with the KOH.) |
Answers
| 1. | 4.5 M |
| 2. | 42.0 g |
| 3. | 2.2 M |
| 4. | 2.5 moles |
| 5. | 20.5 N |
| 6. | 0.21 moles |
| 7. | 0.10 L |
| 8. | 0.51 M |
| 9. | 0.078 L = 78 mL |
| 10. | 0.127 M |
| 11. | 75.0 mL |
| 12. | 50.0 mL |
Excerpted From:
From Chemistry Success in 20 Mintues A Day. Copyright © 2005 by LearningExpress, LLC. All Rights Reserved.
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