Unit#7 Chemistry Pretest Deep Dive

Front

What is a chemical property of a substance?

Back

A chemical property is a characteristic of a substance that becomes evident during a chemical reaction, indicating how it interacts with other substances.

Front

Give an example of a chemical property of water.

Back

Water reacts with pure sodium.

Front

What happens when magnesium reacts with hydrochloric acid (HCl)?

Back

This reaction is an example of a chemical property.

Front

What is the effect of cutting a copper wire into smaller pieces on its mass?

Back

The mass of the wire changes as a result of cutting it.

Front

What type of change occurs when salt dissolves in water?

Back

Dissolving salt in water is a physical change.

Front

What is an indicator of a chemical reaction rate change?

Back

Indicators of a chemical reaction rate change include changes in color, temperature, gas production, and precipitate formation.

Front

Which of the following is NOT an indicator of a chemical reaction rate change?

Back

A change in the state of matter is NOT an indicator of a chemical reaction rate change.

Front

Define physical change in chemistry.

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is the relationship between mass and reaction rate?

Back

The mass of a reactant can affect the reaction rate; generally, more mass can lead to a faster reaction rate.

Front

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

Back

A chemical change results in the formation of new substances, while a physical change does not alter the chemical composition of the substance.