Gas Solubility in Liquids Quiz
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Questions and Answers

What sustains all aquatic life?

  • Dissolved hydrogen chloride gas
  • Pressure of gases
  • High solubility of gases
  • Dissolved oxygen (correct)

    • How does the solubility of gases in liquids change with pressure?

  • Becomes negligible
  • Decreases
  • Remains constant
  • Increases (correct)

    • What does Henry's law establish a quantitative relation between?

  • Solubility of oxygen and hydrogen chloride gas
  • Solubility of gases in a liquid and the gas pressure above it (correct)
  • Rate of gaseous particles entering and leaving the solution
  • Temperature and pressure

    • Why does increasing pressure over the solution phase lead to an increase in gas solubility?

    <p>It increases the number of gaseous particles per unit volume over the solution</p> Signup and view all the answers

    In the context of gases dissolving in a solvent, what does dynamic equilibrium imply?

    <p>The rate of gaseous particles entering and leaving the solution is equal</p> Signup and view all the answers

    How is the solubility of a gas affected when the gas is compressed to a smaller volume?

    <p>Solubility increases due to increased number of gaseous particles per unit volume over the solution</p> Signup and view all the answers

    What is the van't Hoff factor (i) of the acetic acid solution?

    <p>1.041</p> Signup and view all the answers

    What is the dissociation constant ($K_a$) of the acetic acid solution?

    <p>1.86 × 10⁻⁵</p> Signup and view all the answers

    What is the molality of the acetic acid solution?

    <p>0.0106 mol kg⁻¹</p> Signup and view all the answers

    What is the observed freezing point depression of the acetic acid solution?

    <p>$0.0205 K$</p> Signup and view all the answers

    What is the calculated freezing point depression of the acetic acid solution?

    <p>$0.0197 K$</p> Signup and view all the answers

    What is the ratio of the observed freezing point depression to the calculated freezing point depression of the acetic acid solution?

    <p>$1.041$</p> Signup and view all the answers

    Why do KH values for N2 and O2 increase with an increase in temperature?

    <p>The solubility of gases increases with temperature.</p> Signup and view all the answers

    Why are aquatic species more comfortable in cold waters according to the text?

    <p>Because cold waters have higher gas solubility.</p> Signup and view all the answers

    What happens to the solubility of gases as temperature decreases?

    <p>The solubility of gases increases.</p> Signup and view all the answers

    What is the relationship between gas solubility and mole fraction in an aqueous solution?

    <p>They are directly proportional.</p> Signup and view all the answers

    If N2 gas is bubbled through water at 303 K, what is expected to happen to its solubility compared to bubbling at 293 K?

    <p>Solubility at 303 K will be higher than at 293 K.</p> Signup and view all the answers

    How does the decrease in gas solubility with an increase in temperature affect aquatic species?

    <p>Aquatic species are more comfortable in cold waters due to higher gas solubility.</p> Signup and view all the answers

    What is the key reason behind positive deviations from Raoult's law?

    <p>The intermolecular attractive forces between the solute-solvent molecules are weaker than those between the solute-solute and solvent-solvent molecules.</p> Signup and view all the answers

    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?

    <p>The vapor pressures of both components are higher than their respective pure component vapor pressures.</p> Signup and view all the answers

    Which of the following is an example of a solution that exhibits positive deviation from Raoult's law?

    <p>Ethanol and acetone</p> Signup and view all the answers

    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?

    <p>The intermolecular attractive forces between the solute-solvent molecules are weaker.</p> Signup and view all the answers

    How does the addition of acetone to ethanol affect the hydrogen bonding between the ethanol molecules?

    <p>The addition of acetone weakens the hydrogen bonding between the ethanol molecules.</p> Signup and view all the answers

    Why does a solution formed by adding carbon disulfide to acetone also exhibit positive deviation from Raoult's law?

    <p>The dipolar interactions between the solute-solvent molecules are weaker than the respective interactions among the solute-solute and solvent-solvent molecules.</p> Signup and view all the answers

    What is the freezing point depression of the solution?

    <p>2.2 K</p> Signup and view all the answers

    What is the molality of ethylene glycol in the solution?

    <p>0.73 mol/kg</p> Signup and view all the answers

    What is the freezing point of the aqueous solution?

    <p>270.95 K</p> Signup and view all the answers

    What does osmosis cause in the thistle funnel?

    <p>Level of solution to rise</p> Signup and view all the answers

    In what conditions do raw mangoes shrivel?

    <p>When pickled in brine</p> Signup and view all the answers

    What happens to wilted flowers when placed in fresh water?

    <p>They revive</p> Signup and view all the answers

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