Review (chemical reactions)

A chemical reaction is a process where a set of substances undergo a chemical change to form a different substance.

• They happen all the time, every where in the world.

•  Every time you eat, your body uses chemical reactions to break down your food into energy.

• Other examples include metal rusting, wood burning, batteries producing electricity, and photosynthesis in plants.

• 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.

• heat production

• change in temperature

• formation of a precipitate

• change in color

• odor production

• light production

• formation of a gas (bubbles)

• 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.

https://youtu.be/WERHhgZxDHU
https://www.youtube.com/watch?v=p5qvi20J5IM

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

• Combustion