Solubility Curves and Solutions Quiz

What does a solubility curve indicate about a substance?

• The melting point of the substance

• The amount of substance that can dissolve in water at various temperatures

• The density of the substance

• The boiling point of the substance

If a solution contains 30 grams of KNO3 in 100 grams of water at 20°C, what is the saturation level?

• Dilute

• Unsaturated

• Saturated

• Supersaturated

What happens if you dissolve more solute than the solubility curve allows at a given temperature?

• The solute changes color

• The solute evaporates

• The solution becomes unsaturated

• The solution becomes supersaturated

How many grams of lead nitrate can dissolve in 300 grams of water at 50°C?

• 85 grams

• 170 grams

• 255 grams

• 340 grams

At what temperature can 50 grams of KCl dissolve in 100 grams of water?

• 25°C

• 100°C

• 50°C

• 75°C

If a saturated solution of KCl at 90°C is cooled to 10°C, how much KCl will precipitate out?

• 45 grams

• 15 grams

• 35 grams

• 25 grams

How many grams of potassium chlorate can dissolve in 100 grams of water at 20°C?

• 12 grams

• 8 grams

• 15 grams

• 5 grams

What adjustment is needed if the amount of solvent is multiplied by four?

• Multiply the solute amount by two

• Multiply the solute amount by four

• Divide the solute amount by four

• No adjustment needed

What is the solubility of potassium chlorate in 100 grams of water at 60°C?

• 30 grams

• 23 grams

• 20 grams

• 15 grams

If the solvent amount is halved, what happens to the solubility of the solute?

• It doubles

• It remains the same

• It halves

• It triples