Saturation and Solubility Curves Explained

The video tutorial explains the concepts of saturated, unsaturated, and supersaturated solutions using a drink mix as an example. It discusses how to determine the type of solution by adding more solute and observing if it dissolves. The video also covers methods to change the saturation point, such as increasing temperature or adding more solvent. Additionally, it introduces solubility curves, which show how much solute can dissolve at various temperatures, and explains how to interpret these graphs to understand solution behavior.

What happens when more drink mix is added to an unsaturated solution?

• The drink mix does not dissolve.

• The drink mix changes color.

• The drink mix dissolves completely.

• The drink mix decreases the water volume.

What indicates that a solution has become saturated?

• The drink mix floats on top.

• The drink mix dissolves partially.

• Undissolved drink mix settles at the bottom.

• The solution changes color.

How can a saturated solution be made unsaturated without adding more solvent?

• By heating the solution.

• By removing some of the solute.

• By stirring the solution.

• By cooling the solution.

What is a supersaturated solution?

• A solution holding the maximum amount of solute at a given temperature.

• A solution holding less solute than it can at a given temperature.

• A solution that cannot dissolve any solute.

• A solution holding more solute than it can normally hold at a given temperature.

What happens when more water is added to a saturated solution?

• No change occurs.

• It becomes an unsaturated solution.

• It remains saturated.

• It becomes a supersaturated solution.

What is the role of a seed crystal in a supersaturated solution?

• It changes the color of the solution.

• It increases the temperature of the solution.

• It dissolves to increase solubility.

• It initiates crystallization, causing excess solute to precipitate.

What effect does increasing the temperature have on the solubility of most solids?

• Does not affect solubility.

• Decreases solubility.

• Makes the solid precipitate.

• Increases solubility.

What is demonstrated by the solubility curve of a substance?

• The density of the substance at various temperatures.

• The maximum amount of solute that can dissolve in a solvent at different temperatures.

• The boiling point of the solute.

• The color change of the solution with temperature.

If 50 grams of potassium nitrate are added to 100 grams of water at 20 degrees Celsius, how much will not dissolve?

• 50 grams

• 30 grams

• 20 grams

• None, all will dissolve

At 20 degrees Celsius, how much potassium nitrate can dissolve in 100 grams of water?

• 30 grams

• 50 grams

• 40 grams

• 20 grams