Ch 13 HW, Part 1 Properties of Solutions

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Ch. 13 HW, Part 1: Properties of Solutions Ch. 13 HW, Part 1: Properties of Solutions Properties of Solutions This is Part 1 for the Chapter 13 Homework which includes problems that cover properties of solutions. u 1/ 1 point Which of the following will always have a AH < 0? o solvation ) solute separation ) solvent separation (sum of all the steps) ") both solvation andsSolution formation u 1/ 1 point What are two good driving forces for spontaneity? O - AHand +AS ) +AHand-AS ) -AHand-AS ) +AHand + AS Feedback General Feedback A decrease in enthalpy (AH) and an increase in entropy(AS) are both good driving forces for spontaneity. 1/1 point The solubility of CaCl, in water is 25 g per 50 mL of H,0O. How many grams of CaCl, will dissolve to form a saturated solution in 10 mL of water? :*O.Sg

\ Calculate the mass percent of K1 in a solution made by dissolving 3.2 g of Kl in 43.5 g of water. Answer Parameters: 1. Report your answer with TWO significant figures. 2.IF NEGATIVE, a- sign must be placed IN FRONT of the number. 3. The number must be in decimal form and not include any other units or symbols. . oo Feedback General Feedback mass of solute Use this equation to calculate mass percent. Remember, the mass of the solution is the mass of the solute + mass of the solvent in g mass % of KI = X 100 total mass of solution \ Answer Parameters: Calculate the molality of a 13.8% (by mass) aqueous solution of hydrochloric acid (HCI). 1. Report your answer with THREE significant figures. 2.IF NEGATIVE, - sign must be placed IN FRONT of the number. 3. The number must be in decimal form and not include any other units or symbols. . 0 Ascorbic acid (Vitamin C, CgHgO4) is a water-soluble vitamin with a molar mass of 176.12 g/mol. A solution containing 80.5 g of ascorbic acid dissolved in 210.0 g of water has a Answer Parameters: density of 1.22 g/mL at 55.0 °C. Calculate the molarity of this solution. 1. Report your answer with THREE significant figures. 2.IF NEGATIVE, a - sign must be placed IN FRONT of the number. 3. The number must be in decimal form and not include any other units or symbols. |

1/1 point Which of the following is expected to be most soluble in water? ) Oz ) CeH1a D) CH4 O CH;0H () Hy Feedback General Feedback Polar liquids tend to dissolve in polar solvents and nonpolar liquids tend to dissolve in nonpolar solvents. We refer to this as "Like dissolves like". n 1/ 1 point Which of the following will decrease the solubility of a gas in water? (choose all that apply) | use asolvent that has similar intermolecular forces as the gas. | increasing the pressure increasing the temperature decreasing the temperature decreasing the pressure

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