Concentration/Solubility/Dilution worksheet Concentration 1. 65 g of sugar is dissolved in 750 mL of water. What is the concentration of the solution? 2. I have 600 mL of water. If I want a solution of salt water with a concentration of 80 g/L, how much salt do I need to add to my water? 3. Which is more concentrated: 34 g of salt dissolved in 100 mL of water, or 100 g of salt in 450 mL of water? 4. If the concentration of a solution is determined to be 0.27 g/mL and it was dissolved in 200 mL of solvent, how much solute was used to make it? 5. If the concentration of sugar in water is determined to be 0.45 g/mL and 100 g of sugar was used to make the solution, how much water was used? 6. Vegetable oil is insoluble in water. How many mL of water do I need to dissolve 10mL of vegetable oil? 7. Red brass consists of 90% copper and 10% zinc, whereas bronze consists of 90% copper and 10% tin. a. What is or are the solvent(s) in these alloys? b. A bronze statue weighs 16 kg. What weight do tin atoms represent? 8. I am trying to compare the content of salt in three soups: Soup 1 has 9.6 g of salt in a can of 1200 mL Soup 2 has a concentration of salt of 7.5 g/L Soup 3 has a 1% m/V salt concentration Which soup will have the most amount of salt in a bowl of the same size? 9. Consider the three following alcohols. If I pour the same quantity of each in three identical glasses, which one will have the most alcohol content? Rum : 27g of alcohol in a glass of 60mL Vodka : 32% m/V of alcohol Scotch Whiskey : concentration of alcohol of 0.52 g/mL Changes in Concentration - Dilution 10. I have a 500 mL solution of salt water with a concentration of 17 g/L. I add 6 g of salt. What is the new concentration? 11. I have a 800 mL solution of sugar water with a concentration of 0.4 g/mL. I add 200 mL of water. What is the new concentration? 12. Solution A: 300mL of salt water with concentration 43 g/L. Solution B: 200mL of salt water with concentration 25g/L. If I mix the two solutions, what will be the new concentration? 13. Solution A: 520 mL of salt water with concentration 120 g/L. Solution B: 380mL of pure water. If I mix the two solutions, what will be the new concentration? 14. Solution A: 200 mL of salt water with concentration 10 g/L. Solution B: 200 mL of sugar water with concentration 10 g/L. If I mix the two solutions, what will be the new salt concentration? What will be the new sugar concentration? 15. I have a 200mL solution of sulfuric acid with a concentration of 100 g/L. I want to dilute it to get a solution with a concentration of 20 g/L. How much water do I need to add? 16. I have a 400mL solution of sulfuric acid with a concentration of 80 g/L. I want to dilute it to get a solution with a concentration of 50 g/L. How much water do I need to add? Solubility 17. The solubility of sugar in water at room temperature (20°C) is 2.03 g/mL. If I stir 400g of sugar into 300 mL of water, will I have any solid sugar left? 18. What if I stirred 400g of sugar into 150 mL of water? How much solid sugar would remain at the bottom of my cup? 19. What would happen if I heated my saturated sugar water mixture?
