unit 9 Solubility Pretest

Front

What is solubility?

Back

Solubility is the ability of a substance (solute) to dissolve in a solvent (usually water) at a given temperature and pressure.

Front

What is a saturated solution?

Back

A saturated solution is one that contains the maximum amount of solute that can dissolve at a specific temperature.

Front

What is molarity?

Back

Molarity is a measure of concentration, defined as the number of moles of solute per liter of solution (mol/L).

Front

What is an electrolyte?

Back

An electrolyte is a substance that dissociates into ions in solution and conducts electricity.

Front

Which compound dissociates completely in water: KCl, CaCO3, or CaCl2?

Back

CaCl2 dissociates completely in water, making it a strong electrolyte.

Front

What factors affect solubility?

Back

Factors affecting solubility include temperature, pressure, and the nature of the solute and solvent.

Front

What is the difference between unsaturated and supersaturated solutions?

Back

An unsaturated solution contains less solute than can be dissolved, while a supersaturated solution contains more solute than can normally dissolve at that temperature.

Front

What is the formula to calculate molarity?

Back

Molarity (M) = moles of solute / liters of solution.

Front

What type of molecules are likely to dissolve in water?

Back

Polar molecules and ionic compounds, like KCl, are likely to dissolve in water.

Front

What is the significance of temperature in solubility?

Back

Temperature generally increases the solubility of solids in liquids but can decrease the solubility of gases.