Molarity Worksheet 1 1. What does molarity mean? 2. What is the molarity of a solution that contains 4.53 moles of lithium nitrate in 2.85 liters of solution?
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MOLARITY WORKSHEET #1 For each of the following problems, use proper units and show ALL work:
1. If 10.7 grams of NH4Cl is dissolved in enough water to make 800 mL of solution, what will be its molarity? (Answer: 0.25 mol/L).
2. Calculate the molarity of a solution prepared by dissolving 6.80 grams of AgNO3 in enough water to make 2.50 liters of solution. (Answer: 0.016 mol/L).
3. How many moles of CaCl2 are required to prepare 2.00 liters of 0.700 M CaCl2? (Answer: 1.4 moles).
4. What mass, in grams, of CaCl2 will be required to prepare the above solution? (Answer: 155 grams).
5. How many grams of KNO3 will be required to prepare 800 mL of 1.40 M KNO3? (Answer: 113 grams).
6. Calculate the volume of a 1.25 M solution of HCN made from 31.0 grams of HCN. (Answer: 0.919 Liters).
7. Calculate the volume of a 3.50 molar solution of H2SO4 made from 49.0 grams of H2SO4 . (Answer: 0.143 Liters).
8. How many sugar molecules are present in 300 mL of a 2.0 M solution? (The formula for sugar is C 12H22 O11) (Answer: 3.6 x 1023 molecules).
9. Your teacher asks you to prepare 500 mL of a 2.75 molar solution of NaCl for an upcoming laboratory experiment. Write a step-by-step procedure describing how you would carry out this task.
