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1. Calculate the % by mass of solute in a solution containing 8.32 g K2Cr2O7 in 25.0 g solution. 2. How many grams of Na2SO4 are in 600.0 g of 12.0% (by mass) Na2SO4 solution? 3. In complete sentences, describe how you would prepare 500.0 mL of 8.22% Na2SO4 solution. Include how many grams of solute (Na2SO4) and how many mL of solvent (H20) you would mix. Provide your calculation. 4. Calculate the molarity (M) of a solution containing 25.0 g NaOH in 2.11 liters of solution. 5. How many grams of Na2SO4 are in 600.0 mL of 12.5 M Na2SO4 solution? 6. How many moles of HCl are present in 25.00 mL of 0.324 M HCl solution? 7a. In complete sentences, describe how you would prepare 0.500 L of 0.231 M Na2SO4 solution from 6.00 M Na2SO4 solution by dilution with water. Provide your calculation. 76. In complete sentences, describe how you would prepare 0.500 L of 0.231 M Na2SO4 solution from pure solid Na2SO4. 8. Aluminum hydroxide will react with hydrochloric acid to yield aluminum chloride and water. a. Write the balanced equation for this reaction. b. How many grams of aluminum hydroxide will react with 25.0 mL of 0.541 M HCl solution? c. If 0.875 g of aluminum hydroxide reacts exactly with 22.00 mL of an HCl solution, what is the molarity of the HCl solution? 9. What is the molarity of a concentrated 37.0 % hydrochloric acid solution, given that the density of the solution is 1.11 g/mL