AP Chem Unit 4

Front

What is reduction in a chemical reaction?

Back

Reduction is the gain of electrons by a species in a chemical reaction.

Front

Identify the species that is oxidized in a reaction.

Back

The species that loses electrons is oxidized.

Front

What role does water play in the reaction NH₃ + H₂O ↔ NH₄⁺ + OH^-?

Back

In this reaction, water acts as an acid.

Front

What is oxidation in a chemical reaction?

Back

Oxidation is the loss of electrons by a species in a chemical reaction.

Front

What is a precipitate in a chemical reaction?

Back

A precipitate is an insoluble solid that forms when two aqueous solutions react.

Front

In the reaction Fe_(s) + 2 Ag⁺_(aq) → Fe²⁺_(aq) + 2 Ag_(s), which species is reduced?

Back

Ag (silver) is the species that is reduced.

Front

What is the definition of a redox reaction?

Back

A redox reaction is a chemical reaction that involves the transfer of electrons between two species.

Front

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

Back

The oxidation state helps to determine how many electrons are lost or gained by an atom during a reaction.

Front

What is the formula for calculating the oxidation state of an element in a compound?

Back

The oxidation state can be calculated based on the rules of oxidation states, considering the charge of the compound and the known oxidation states of other elements.

Front

In the reaction Zn + H₂O → ZnO₂ + H₂, which element is oxidized?

Back

Zinc (Zn) is oxidized in this reaction.