Unit 3 Part 1 Review

Is a change in matter that produces one or more new substances

• precipitate

• endothermic reaction

• chemical reaction

• activation energy

A solid that forms from a solution during a chemical reaction

• precipitate

• concentration

• chemical reaction

• inhibitor

A reaction that absorbs energy in the form of heat

• catalyst

• endothermic reaction

• enzyme

• precipitate

A reaction that releases energy in the form of heat

• activation energy

• concentration

• exothermic reaction

• catalyst

The total mass of the reactants must equal the total mass of products. Matter is never created or destroyed

• Conservation of Mass

• Pascal's Principle

• catalyst

• inhibitor

Reactions that have hydrocarbons (CH₄) and oxygen as reactants and carbon dioxide and water as products

• Conservation of Mass

• combustion

• double replacement

• decomposition

When two or more substances combine to form a more complex substance

• compound

• double replacement

• synthesis

• catalyst

Starts with two compounds as reactants, that recombine to form two new compounds as products

• compound

• catalyst

• combustion

• double replacement

One compound and a free element that recombine to yield a new compound and a new free element

• combustion

• synthesis

• decomposition

• single replacement

Which type of chemical reaction is this:

FeCl₂ + K₂S --------- FeS + 2KCl

• synthesis

• double replacement

• combustion

• single replacement