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Chapter 13: Problem 36

Indicate whether each statement is true or false: (a) If you compare the solubility of a gas in water at two different temperatures, you find the gas is more soluble at the lower temperature. (b) The solubility of most ionic solids in water decreases as the temperature of the solution increases. (c) The solubility of most gases in water decreases as the temperature increases because water is breaking its hydrogen bonding to the gas molecules as the temperature is raised. (d) Some ionic solids become less soluble in water as the temperature is raised.

Short Answer

Expert verified
(a) True (b) False (c) False (d) True

Step by step solution

01

Statement (a)

We need to determine if it's true or false that the solubility of a gas in water is more at lower temperature compared to a higher temperature. It is generally true that the solubility of gases in water decreases as the temperature increases. This is because gas molecules have a higher kinetic energy at higher temperatures, making it more difficult for them to be trapped by the water molecules. Thus, statement (a) is true.
02

Statement (b)

We need to determine if it's true or false that the solubility of most ionic solids in water decreases as the temperature of the solution increases. In general, the solubility of ionic solids in water increases with increasing temperature due to the increased kinetic energy of the water molecules and the increased ability to break the ionic bonds in the solid. However, there are some exceptions where the solubility of ionic solids can decrease with increasing temperature. Thus, statement (b) is false.
03

Statement (c)

We need to determine if it's true or false that the solubility of most gases in water decreases as the temperature increases because water is breaking its hydrogen bonding to the gas molecules as the temperature is raised. The solubility of most gases in water decreases as the temperature increases, but this is not due to the breaking of hydrogen bonds between water and gas molecules. Rather, it is due to the increased kinetic energy of gas molecules at higher temperatures, making it more difficult for them to be trapped by the water molecules. Thus, statement (c) is false.
04

Statement (d)

We need to determine if it's true or false that some ionic solids become less soluble in water as the temperature is raised. While it is generally true that the solubility of ionic solids in water increases with increasing temperature, there are exceptions where certain ionic solids become less soluble as temperature increases (e.g., calcium sulfate). So statement (d) is true.

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