Chem Final Exam

Front

Which substance exists in aqueous solution only as molecules?

Back

CH3OH (Methanol) exists in aqueous solution only as molecules.

Front

Identify a pair that does not represent a conjugate acid-base pair.

Back

H3PO4/HPO42- does not represent a conjugate acid-base pair.

Front

What is an example of a true solution?

Back

Apple juice is an example of a true solution.

Front

Calculate the [H3O+] and the pH of a 0.021 M HNO3 solution.

Back

[H3O+] = 0.021 M and pH = 1.68.

Front

Identify the Brønsted-Lowry acids in the reaction: H2O + CH3CO2H ⇌ H3O+ + CH3CO2-

Back

CH3CO2H and H3O+ are the Brønsted-Lowry acids.

Front

What is a conjugate acid-base pair?

Back

A conjugate acid-base pair consists of two species that transform into each other by the gain or loss of a proton.

Front

Define a true solution.

Back

A true solution is a homogeneous mixture where the solute is completely dissolved in the solvent.

Front

What is the pH scale?

Back

The pH scale measures the acidity or basicity of a solution, ranging from 0 (acidic) to 14 (basic), with 7 being neutral.

Front

What is the difference between strong and weak acids?

Back

Strong acids completely dissociate in solution, while weak acids only partially dissociate.

Front

What is the role of water in acid-base reactions?

Back

Water can act as both an acid and a base, depending on the reaction context.