Chemical Reactions and Balancing Equations Quiz

Evidence for a chemical reaction

1. Evolution of heat and light

2. Production of a gas (bubbles/fuzzing, NOT boiling)

3. Formation of a precipitate

4. Unexpected color change

Precipitate

Solid formed during a chemical reaction between two liquids

Reactants turn into _______.

Products

Law of Conservation of Mass

Matter is neither created nor destroyed during a chemical reaction.

Diatomic elements way to remember them

Elements who, when found in nature, will never be by themselves and will always have at least 2 atoms bonded together.

HON7

• 7 represents halogens

What are the types of reactions?

1. Synthesis (S)

2. Decomposition (D)

3. Single Replacement (SR)

4. Double Replacement (DR)

5. Combustion (C)

Synthesis (S)

Multiple reactants form a single product

Decomposition (D)

One reactant forms multiple products

Single Replacement (SR)

Element + Compound on both sides

• the lone element must be more reactive (higher on the activity series) than the element it would potentially replace

• Metal for metal or nonmetal for nonmetal

Double Replacement (DR)

Compound + Compound on both sides

• one of the potential products must form water, gas, or a precipitate, or (solid) insoluble compound

Combustion (C)

A hydrocarbon reacts with oxygen to produce water and carbon dioxide

Hydrocarbon

Chemicals that only contain hydrogen and carbon, they follow different rules for naming

Activity Series

A list of elements that is organized by how they react with each other, arranged by reactivity from highest to lowest