AP Chemistry Unit 4 Review

Front

What do combustion reactions produce?

Back

Water Vapor and Carbon Dioxide

Front

Identify a conjugate acid-base pair in the reaction: CH₃CH₂COOH(aq) + H₂O(l) ⇄ CH₃CH₂COO⁻(aq) + H₃O⁺(aq).

Back

CH₃CH₂COO⁻(aq) and CH₃CH₂COOH(aq)

Front

What are spectator ions?

Back

Spectator ions do not undergo chemical change during a chemical reaction.

Front

What is the oxidation number of N in NO₂¹⁻?

Back

3

Front

What is the net ionic equation for the precipitation reaction between sodium carbonate and magnesium sulfate?

Back

CO₃²⁻ + Mg²⁺ → MgCO₃

Front

Define a combustion reaction.

Back

A combustion reaction is a chemical reaction that occurs when a substance reacts with oxygen, producing heat and light.

Front

What is a conjugate acid?

Back

A conjugate acid is the species formed when a base gains a proton (H⁺).

Front

What is a conjugate base?

Back

A conjugate base is the species that remains after an acid has donated a proton (H⁺).

Front

What is the role of spectator ions in a chemical reaction?

Back

Spectator ions are ions that do not participate in the actual chemical reaction and remain unchanged.

Front

How do you determine the oxidation number of an element in a compound?

Back

The oxidation number can be determined by using rules such as the oxidation state of elements in their elemental form is 0, and the sum of oxidation numbers in a neutral compound is 0.