30 Questions
What sustains all aquatic life?
Dissolved oxygen
How does the solubility of gases in liquids change with pressure?
Increases
What does Henry's law establish a quantitative relation between?
Solubility of gases in a liquid and the gas pressure above it
Why does increasing pressure over the solution phase lead to an increase in gas solubility?
It increases the number of gaseous particles per unit volume over the solution
In the context of gases dissolving in a solvent, what does dynamic equilibrium imply?
The rate of gaseous particles entering and leaving the solution is equal
How is the solubility of a gas affected when the gas is compressed to a smaller volume?
Solubility increases due to increased number of gaseous particles per unit volume over the solution
What is the van't Hoff factor (i) of the acetic acid solution?
1.041
What is the dissociation constant ($K_a$) of the acetic acid solution?
1.86 × 10⁻⁵
What is the molality of the acetic acid solution?
0.0106 mol kg⁻¹
What is the observed freezing point depression of the acetic acid solution?
$0.0205 K$
What is the calculated freezing point depression of the acetic acid solution?
$0.0197 K$
What is the ratio of the observed freezing point depression to the calculated freezing point depression of the acetic acid solution?
$1.041$
Why do KH values for N2 and O2 increase with an increase in temperature?
The solubility of gases increases with temperature.
Why are aquatic species more comfortable in cold waters according to the text?
Because cold waters have higher gas solubility.
What happens to the solubility of gases as temperature decreases?
The solubility of gases increases.
What is the relationship between gas solubility and mole fraction in an aqueous solution?
They are directly proportional.
If N2 gas is bubbled through water at 303 K, what is expected to happen to its solubility compared to bubbling at 293 K?
Solubility at 303 K will be higher than at 293 K.
How does the decrease in gas solubility with an increase in temperature affect aquatic species?
Aquatic species are more comfortable in cold waters due to higher gas solubility.
What is the key reason behind positive deviations from Raoult's law?
The intermolecular attractive forces between the solute-solvent molecules are weaker than those between the solute-solute and solvent-solvent molecules.
How do the vapor pressures of the two components in a solution that shows positive deviation from Raoult's law compare to their pure component vapor pressures?
The vapor pressures of both components are higher than their respective pure component vapor pressures.
Which of the following is an example of a solution that exhibits positive deviation from Raoult's law?
Ethanol and acetone
In a solution that shows positive deviation from Raoult's law, what happens to the intermolecular attractive forces between the solute-solvent molecules compared to the solute-solute and solvent-solvent molecules?
The intermolecular attractive forces between the solute-solvent molecules are weaker.
How does the addition of acetone to ethanol affect the hydrogen bonding between the ethanol molecules?
The addition of acetone weakens the hydrogen bonding between the ethanol molecules.
Why does a solution formed by adding carbon disulfide to acetone also exhibit positive deviation from Raoult's law?
The dipolar interactions between the solute-solvent molecules are weaker than the respective interactions among the solute-solute and solvent-solvent molecules.
What is the freezing point depression of the solution?
2.2 K
What is the molality of ethylene glycol in the solution?
0.73 mol/kg
What is the freezing point of the aqueous solution?
270.95 K
What does osmosis cause in the thistle funnel?
Level of solution to rise
In what conditions do raw mangoes shrivel?
When pickled in brine
What happens to wilted flowers when placed in fresh water?
They revive
Test your knowledge on the solubility of gases in liquids, including factors affecting solubility like pressure and temperature. Learn about how gases dissolve in water and how it sustains aquatic life.
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