Unit 3 sect 3 - 4 Review

Front

What is the law of conservation of mass?

Back

In a chemical reaction, the mass of the products equals the mass of the reactants, meaning the number of atoms in the products will always equal the number of atoms in the reactants.

Front

What is the pH scale?

Back

The pH scale measures how acidic or basic a solution is, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What pH value indicates an acidic substance?

Back

A pH value below 7 indicates an acidic substance.

Front

What is flammability?

Back

Flammability is a chemical property that describes how easily a substance can ignite and burn.

Front

What are indicators in chemistry?

Back

Indicators are substances used to determine the pH of a solution, indicating whether it is acidic, basic, or neutral.

Front

What is a chemical change?

Back

A chemical change is a process where substances transform into different substances, such as baking a cake.

Front

What is a physical change?

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 an example of a physical property?

Back

Color, shape, and boiling point are examples of physical properties.

Front

What is an example of a chemical property?

Back

Reactivity with acids is an example of a chemical property.

Front

What happens to the atoms during a chemical reaction?

Back

Atoms are rearranged to form new substances, but the total number of atoms remains the same.