Solubility and Saturated Solutions

The video tutorial covers solubility rules and introduces solubility curves, which graphically represent the solubility of salts over a temperature range. It compares the solubility of copper 2 sulfate and potassium sulfate, highlighting that solubility generally increases with temperature. The tutorial explains how to read solubility curves and determine solubility at specific temperatures. It also discusses saturated and supersaturated solutions, where excess solute may crystallize out of solution.

What is the primary purpose of solubility rules?

• To determine the color of a salt

• To predict if a salt is soluble in water

• To measure the density of a salt

• To calculate the boiling point of a salt

Which salt is more soluble in water at the same temperature?

• Potassium sulfate

• Copper(II) sulfate

• Both are equally soluble

• Neither is soluble

How is the solubility of a salt typically measured?

• In grams of water per gram of salt

• In grams of salt per liter of water

• In grams of salt per 100 grams of water

• In liters of water per gram of salt

What generally happens to the solubility of a solid in a liquid as temperature increases?

• It decreases

• It remains constant

• It fluctuates randomly

• It increases

What is a solubility curve?

• A graph showing the density of a salt

• A graph showing the melting point of a salt

• A graph showing solubility over a range of temperatures

• A graph showing the boiling point of a salt

How can you find the solubility of a salt at a specific temperature using a solubility curve?

• By drawing a horizontal line from the temperature on the y-axis to the curve

• By calculating the boiling point of the salt

• By drawing a vertical line from the temperature on the x-axis to the curve

• By measuring the density of the salt

At 90°C, how much copper(II) sulfate is soluble in 100 grams of water?

• 90 grams

• 18 grams

• 68 grams

• 24 grams

What is a saturated solution?

• A solution where no more solute can dissolve

• A solution with excess solute

• A solution that is boiling

• A solution with no solute

What happens when a saturated solution is cooled?

• It evaporates

• It remains unchanged

• It becomes a supersaturated solution

• It becomes unsaturated

What might occur in a supersaturated solution?

• The solution will boil

• The solute will dissolve further

• The solute may crystallize

• The solution will freeze