AP Chemistry Unit 4

Front

What is a sign that a chemical reaction has taken place when mixing solutions?

Back

A possible sign is that the resulting solution has changed color.

Front

What type of change occurs when water in a beaker vaporizes?

Back

This is a physical or phase change.

Front

What is a precipitation reaction?

Back

A precipitation reaction occurs when two aqueous solutions react to form an insoluble solid, known as a precipitate.

Front

What is the term for the substance of known concentration and volume in a titration?

Back

The substance is known as the titrant.

Front

What is a Brønsted-Lowry acid?

Back

A Brønsted-Lowry acid is a proton donor.

Front

What is the general equation for a neutralization reaction?

Back

A neutralization reaction typically involves an acid reacting with a base to produce water and a salt.

Front

What is the role of a catalyst in a chemical reaction?

Back

A catalyst speeds up a chemical reaction without being consumed in the process.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the law of conservation of mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction.

Front

What is an example of a strong acid?

Back

An example of a strong acid is hydrochloric acid (HCl).