Understanding Solutions and Solubility Concepts

What is solubility?

• The ability of a substance to dissolve in another and form a solution.

• The process of a liquid turning into a gas.

• The ability of a substance to remain undissolved in a liquid.

• The chemical reaction between two substances.

What is a solvent?

• The substance that gets dissolved.

• The substance that does the dissolving.

• The resulting mixture after dissolving.

• A substance that cannot dissolve anything.

What is a solute?

• The substance that does the dissolving.

• The substance that gets dissolved.

• The liquid component of a solution.

• A substance that forms a suspension.

What is the chemical formula for water?

• CO2

• O2

• H2O

• NaCl

Why is water considered a polar molecule?

• It has an equal distribution of electrons.

• The hydrogen atoms are stronger than the oxygen atom.

• Electrons shared between hydrogen and oxygen atoms are hogged by the oxygen atom, creating slight charges.

• It is a non-polar molecule.

What happens to sodium and chloride ions when salt dissolves in water?

• They remain bonded together as a crystal.

• They dissociate and are surrounded by water molecules.

• They evaporate from the water.

• They form a new compound with water.

What is the key difference between a true solution and a suspension or colloid?

• In a true solution, individual molecules or ions are surrounded by the solvent.

• Suspensions and colloids are always clear, while solutions are cloudy.

• Only true solutions can be tasted.

• Suspensions and colloids involve chemical reactions, while solutions do not.

Why is oil insoluble in water?

• Oil is denser than water.

• Oil has positive or negative charges that water molecules cannot interact with.

• Oil does not have positive or negative charges for water molecules to interact with.

• Oil forms a chemical bond with water.