Solubility Curves

If a saturated solution of K₂Cr₂O₇ at 50°C is cooled to 20°C, how much solid precipitates?

• 15 g

• 19 g

• 22 g

• 25 g

How does temperature affect the solubility of gases in liquids?

• Generally, the solubility of gases decreases with an increase in temperature.

• The solubility of gases increases with an increase in temperature.

• Temperature has no effect on the solubility of gases in liquids.

• The solubility of gases fluctuates randomly with temperature changes.

What is an unsaturated solution?

• A solution that contains more solute than can be dissolved at a given temperature.

• A solution that contains less solute than can be dissolved at a given temperature, meaning more solute can still be added.

• A solution that has reached its maximum solute capacity at a given temperature.

• A solution that contains no solute at all.

What is the significance of a solubility curve in chemistry?

• It helps predict how much solute can dissolve at different temperatures, which is crucial for various applications in chemistry and industry.

• It determines the pH level of a solution at various temperatures.

• It indicates the boiling point of a solvent under different pressures.

• It shows the relationship between solute concentration and the rate of reaction.

Define saturated solution.

• A solution that contains no solute at all.

• A solution in which the maximum amount of solute has been dissolved at a given temperature, and any additional solute will remain undissolved.

• A solution that can dissolve more solute at a higher temperature.

• A solution that has an equal amount of solute and solvent.

How many grams of K₂Cr₂O₇ are soluble in 100 g of water at 95 ºC?

• 50 grams

• 75 grams

• 100 grams

• 25 grams

At what temperature does the solubility of NaCl match that of K₂Cr₂O₇?

• 40 ºC

• 50 ºC

• 60 ºC

• 70 ºC

How does temperature generally affect the solubility of solids in liquids?

• Generally, the solubility of solids decreases with an increase in temperature.

• Generally, the solubility of solids remains unchanged with an increase in temperature.

• Generally, the solubility of solids increases with an increase in temperature.

• Generally, the solubility of solids is not affected by temperature.

What is a supersaturated solution?

• A solution that contains more solute than can normally dissolve at a given temperature, often achieved by heating the solution and then cooling it.

• A solution that contains the maximum amount of solute that can dissolve at a given temperature.

• A solution that has no solute dissolved in it at all.

• A solution that contains less solute than can normally dissolve at a given temperature.

Explain the concept of solubility product (Ksp).

• The equilibrium constant for a saturated solution of a sparingly soluble ionic compound, representing the product of the concentrations of the ions each raised to the power of their coefficients in the balanced equation.

• A measure of how much solute can dissolve in a solvent at a given temperature.

• The maximum amount of solute that can be dissolved in a solution before it becomes saturated.

• The ratio of the concentration of the solute to the concentration of the solvent in a solution.