Chemical reactions and energy flashcard

Front

A substance that undergoes a change in a chemical reaction is a(n) ___________.

Back

reactant

Front

This is an example of a ___________________________.

Back

chemical equation

Front

Substances present at the start of a chemical reaction are called ___________.

Back

reactants

Front

The starting materials in a chemical reaction are known as ___________.

Back

Reactants

Front

You know that a chemical reaction has occurred if ___________.

Back

there is a precipitate (new solid), there is a color change, or there is a temperature change.

Front

What do we call the substances formed as a result of a chemical reaction?

Back

Products

Front

In a chemical equation, what do we call the numbers that appear before the reactants and products?

Back

Coefficients

Front

What is the term for a representation of a chemical reaction using symbols and formulas?

Back

Chemical equation

Front

What is the difference between reactants and products in a chemical reaction?

Back

Reactants are the starting materials, while products are the substances formed.

Front

What evidence might indicate that a chemical reaction has taken place?

Back

Color change, temperature change, gas production, or formation of a precipitate.