CP Chemistry - Unit 6 Test

The pH scale allows scientists to define the acidity/basicity of a substance on a scale of _____

• 0 - 14

• 0 - 7

• 1 - 7

• 1 - 14

Which of the following statements about a catalyst is true?

• A catalyst can be changed during a reaction.

• A catalyst can be consumed during a reaction.

• A catalyst can initiate a reaction.

• A catalyst can accelerate a reaction.

Tags

NGSS.HS-PS1-5

Which model states that an acid is a substance that contains hydrogen and ionizes to produce hydrogen ions?

• Arrhenius

• Bronsted-Lowry

• Lewis

• Hydrogen

A/An _____ is a substance that increases the rate of a chemical reaction.

• catalyst

• reactant

• product

• inhibitor

Tags

NGSS.HS-PS1-5

In the Bronsted-Lowry model of acids and bases, an _____ is a hydrogen donor and a _____ is a hydrogen acceptor.

• base, acid

• acid, base

A collision requires _____ to be effective.

• enough energy and favorable orientation

• only enough energy

• favorable orientation

• a reaction mechanism

A/An _____ is a substance that slows down the rate of a reaction.

• catalyst

• inhibitor

• reactant

• product

Tags

NGSS.HS-PS1-5

What change can result in a shift in equilibrium during a reaction?

• change in concentration

• change in temperature

• change in volume and pressure

• all of the above

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

A _____ reaction is a chemical reaction that can occur in both the forward and reverse directions.

• complete

• incomplete

• forward

• reversible

Tags

NGSS.HS-PS1-6

Two molecules collide but bounce apart unchanged. What two reasons could account for their failure to react?

• They do not have enough energy and are not oriented correctly.

• They are both non-reactive gases and are at low temperature.

• They are in a solid state and have high activation energy.

• They are both catalysts and do not react with each other.

Tags

NGSS.HS-PS1-4