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1. Write the units for the following concentration units. a. Molarity b. Molality c. Mole fraction d. Percent volume 2. If you dissolve 13.87 g of Li₂CO3 in enough water to make a 50.00 mL solution, what is the molarity of the solution? 3. How many milliliters of a 6.0 M HCl solution will you need to have 56.7 g of HCI? 4. In the lab you dissolve 80.67 g of Mg(NO3)2 in 45.0 g of water. What is the molality of the solution? 5. What is the mass of the solvent in a 25.0 g sample of 0.267 m NaCl solution? 6. What is the molality of a 0.100 M HCIO4 solution if the density is 1.0228 g/ml? 7. What is the vapor pressure of water at 52.00°C when 52.9 g of AgCl is added to 560 g of water? The vapor pressure of water at 52.00°C is 102.1 torr. 8. Water (K=0.512°C/m and K = 1.86°C/m) usually boils at 100°C and freezes at 0°C. a. If 4.23 g of Kl are added to 89.3 g of water, what will be the new freezing and melting point? b. If the same number of mols of KI and CuCl₂ are added to 100 g of water, which will cause the largest change in the boiling and freezing point? Why? 9. Acetic acid (K, = 3.07 °C/m) normally boils at 117.9°C. If 1.26 g of water is added to 96.0 g of acetic acid, what will the new boiling point be? 10. Ethylene glycol (K = 3.11°C/m) is used to make antifreeze and it usually freezes at -12.9°C. If 9.63 g of water are added to 65.4 g of ethylene glycol, what will the new freezing point be?
1. Write the units for the following concentration units. a. Molarity b. Molality c. Mole fraction d. Percent volume 2. If you dissolve 13.87 g of Li₂CO3 in enough water to make a 50.00 mL solution, what is the molarity of the solution? 3. How many milliliters of a 6.0 M HCl solution will you need to have 56.7 g of HCI? 4. In the lab you dissolve 80.67 g of Mg(NO3)2 in 45.0 g of water. What is the molality of the solution? 5. What is the mass of the solvent in a 25.0 g sample of 0.267 m NaCl solution? 6. What is the molality of a 0.100 M HCIO4 solution if the density is 1.0228 g/ml? 7. What is the vapor pressure of water at 52.00°C when 52.9 g of AgCl is added to 560 g of water? The vapor pressure of water at 52.00°C is 102.1 torr. 8. Water (K=0.512°C/m and K = 1.86°C/m) usually boils at 100°C and freezes at 0°C. a. If 4.23 g of Kl are added to 89.3 g of water, what will be the new freezing and melting point? b. If the same number of mols of KI and CuCl₂ are added to 100 g of water, which will cause the largest change in the boiling and freezing point? Why? 9. Acetic acid (K, = 3.07 °C/m) normally boils at 117.9°C. If 1.26 g of water is added to 96.0 g of acetic acid, what will the new boiling point be? 10. Ethylene glycol (K = 3.11°C/m) is used to make antifreeze and it usually freezes at -12.9°C. If 9.63 g of water are added to 65.4 g of ethylene glycol, what will the new freezing point be?