Unit 3 Chemical Reactions

Front

What is a chemical reaction?

Back

A process where substances (reactants) are transformed into new substances (products) through the breaking and forming of chemical bonds.

Front

What is an acid?

Back

A substance that donates hydrogen ions (H+) in a solution and has a pH less than 7.

Front

What is a base?

Back

A substance that accepts hydrogen ions (H+) or donates hydroxide ions (OH-) in a solution and has a pH greater than 7.

Front

What happens during a neutralization reaction?

Back

An acid reacts with a base to produce water and a salt.

Front

What is the pH scale?

Back

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

Front

What are the products of the reaction between hydrogen and oxygen?

Back

Water (H2O).

Front

What is an exothermic reaction?

Back

A chemical reaction that releases energy in the form of heat.

Front

What is an endothermic reaction?

Back

A chemical reaction that absorbs energy from its surroundings.

Front

What are ions?

Back

Atoms or molecules that have gained or lost one or more electrons, resulting in a net electrical charge.

Front

What is the role of water in chemical reactions?

Back

Water can act as a solvent, reactant, or product in chemical reactions, and it can also participate in ionization.