Signs of a Chemical Change

https://www.youtube.com/watch?v=q76UNX3otvA

Indicators of a Chemical Reaction

• Formation of a gas

• Formation of a precipitate

• Change in color

• Change in temperature without heating or cooling it

• Production of light

• Production of an odor

https://www.youtube.com/watch?v=2EQznGPZY5A

What are reagents, reactants, and products?

• Reactants and reagents are the substances that are used to bring about the chemical reaction

•  A reactant is any substance that is consumed or used up during the reaction.

• The substance that is produced by a chemical reaction is called the product.

​Reactants

​Products

​"reacts with"

"yields" or "forms"

Reaction Rate

• Some happen very quickly like explosions, while others can take a long time, like metal rusting. 

• The reaction rate can be changed by adding energy, a catalyst, or changing the particle size.

• Increasing the concentration or pressure of the reactants can speed up the reaction rate.