Unit 4 Practice

Front

What is a Brønsted-Lowry base?

Back

A Brønsted-Lowry base is a substance that can accept protons (H⁺) in a chemical reaction.

Front

What is the oxidation number of phosphorus (P) in K₃PO₄?

Back

+5

Front

What happens to an atom that loses electrons during a chemical reaction?

Back

The atom is oxidized.

Front

In the reaction NH₃ + H₂O ↔ NH₄⁺ + OH^-, what role does H₂O play?

Back

H₂O acts as an acid.

Front

Is the process MgCl_2(s) → Mg⁺²_(aq) + 2Cl^-1_(aq) chemical or physical?

Back

It is both a chemical and physical process.

Front

Define oxidation in terms of electron transfer.

Back

Oxidation is the process in which an atom or molecule loses electrons.

Front

What is a Brønsted-Lowry acid?

Back

A Brønsted-Lowry acid is a substance that can donate protons (H⁺) in a chemical reaction.

Front

What is the difference between an Arrhenius acid and a Brønsted-Lowry acid?

Back

An Arrhenius acid produces H⁺ ions in water, while a Brønsted-Lowry acid donates protons regardless of the solvent.

Front

What is the significance of the oxidation state in a chemical reaction?

Back

The oxidation state helps determine how electrons are transferred between atoms during a reaction.

Front

What is a spectator ion?

Back

A spectator ion is an ion that does not participate in the actual chemical reaction and remains unchanged.