SOLUBILITY 1

Open Ended

Why is it important to understand the concept of solubility and concentration when making solutions like lemonade?

Open Ended

How are solutions with different amounts of solute described?

Multiple Choice

What is the definition of solubility?

• The ability of a solvent to dissolve in a solute at any temperature

• The maximum amount of a solute that dissolves in a given amount of solvent at a constant temperature

• The amount of solvent needed to dissolve any solute

• The process of separating solute from solvent

Open Ended

Explain how temperature affects the solubility of substances in water, using the examples provided in the tables.

Multiple Choice

Which of the following compounds has the highest solubility in water at 20°C?

• Table salt (NaCl)

• Baking soda (NaHCO3)

• Table sugar (C12H22O11)

• Calcium carbonate (CaCO3)

Open Ended

Compare the solubility of table salt, baking soda, and table sugar in water at 20°C. What does this tell you about their ability to dissolve?

Fill in the Blanks

A saturated solution contains as much

as the solvent can hold at a given temperature.

Multiple Select

Select all statements that are true about unsaturated solutions.

• An unsaturated solution contains less solute than the maximum amount that can be dissolved.

• An unsaturated solution will not dissolve any more solute.

• An unsaturated solution is always more concentrated than a saturated solution.

• As long as the amount of solute is less than the solubility at that temperature, the solution is unsaturated.

Multiple Choice

Which of the following best describes a supersaturated solution?

• A solution that contains less solute than it can hold at a given temperature.

• A solution that contains exactly as much solute as it can hold at a given temperature.

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

• A solution that cannot dissolve any solute at any temperature.

Open Ended

Explain why supersaturated solutions are considered unstable. Use the example of sodium acetate in water to support your answer.

Multiple Choice

What are the three main factors that affect the solubility of a solute?

• Polarity of the solvent, temperature, and pressure

• Concentration, color, and taste

• Volume, mass, and density

• Acidity, alkalinity, and reactivity

Fill in the Blanks

Oil does not dissolve in water because oil molecules are ___ and water molecules are ___.

Multiple Select

According to the table, which solvent-solute combinations are most likely to form a solution?

• Polar solvent and nonpolar solute

• Nonpolar solvent and polar solute

• Polar solvent and polar solute

• Nonpolar solvent and nonpolar solute

Open Ended

Describe how soaps and detergents help remove grease and oil stains from surfaces.

Multiple Choice

How does temperature affect the solubility of solids and gases in a solvent?

• Solubility of solids increases and gases decrease with temperature increase.

• Solubility of both solids and gases increases with temperature increase.

• Solubility of both solids and gases decreases with temperature increase.

• Solubility of solids decreases and gases increase with temperature increase.

Open Ended

Explain how pressure influences the solubility of gases in liquids, using an example from everyday life.

Open Ended

What are three ways to measure the concentration of a solution?

Multiple Choice

Which of the following is a correct way to measure the concentration of a liquid dissolved in another liquid?

• Percent by volume

• Percent by mass

• Molarity

• Density

Fill in the Blanks

Percent by volume is calculated using the formula: Percent by volume =

/ Volume of solution × 100%.

Multiple Choice

In what situation is percent by mass more useful than percent by volume when measuring concentration?

• When the solute is a solid

• When the solute is a liquid

• When the solution is a gas

• When the solute is a mixture

Multiple Choice

What is the formula for calculating molarity in a solution?

• Moles of solute divided by liters of solution

• Grams of solute divided by liters of solution

• Moles of solute divided by grams of solution

• Liters of solute divided by moles of solution

Fill in the Blanks

The molar mass of NaCl is

grams per mole.

Open Ended

Explain how you would prepare a 1-molar (1M) solution of sodium chloride (NaCl) in water, including the calculations involved.

Multiple Choice

Which of the following statements is true about a 1M NaCl solution?

• It contains 58.5 grams of NaCl per liter of solution.

• It contains 1 gram of NaCl per liter of solution.

• It contains 100 grams of NaCl per liter of solution.

• It contains 58.5 grams of NaCl per 100 mL of solution.

Multiple Choice

Compound X has a solubility of 20 g in 100 g of water at 20°C. What is the minimum amount of water needed to dissolve 50 g of compound X?

• 250 g

• 100 g

• 500 g

• 200 g

Multiple Choice

A saturated solution of carbon dioxide in water suddenly experiences an increase in pressure. What happens to the solution?

• Bubbles form as the carbon dioxide comes out of the water.

• It becomes supersaturated.

• It remains saturated.

• More carbon dioxide can now be dissolved in the water.

Open Ended

How would you describe your understanding of the terms saturated, unsaturated, and supersaturated after this lesson?

Multiple Choice

What happens when you keep adding sugar to lemonade and the solution reaches its limit of dissolving sugar?

• The solution becomes saturated and no more sugar will dissolve.

• The solution becomes unsaturated and more sugar can dissolve.

• The solution becomes supersaturated and sugar will dissolve infinitely.

• The solution becomes diluted and tastes less sweet.