Chemical Reactions

What are the five main types of chemical reactions?

• Acidic, basic, neutral, alkaline, and saline

• Synthesis, decomposition, single displacement, double displacement, and combustion

• Addition, subtraction, multiplication, division, and exponentiation

• Oxidation, reduction, ionization, neutralization, and precipitation

What is the law of conservation of mass and how does it relate to balancing chemical equations?

• Mass is created in a chemical reaction, so balancing chemical equations is not necessary

• Mass is neither created nor destroyed in a chemical reaction, it is only rearranged. Balancing chemical equations ensures that the same number of each type of atom is present on both sides of the equation, thus following the law of conservation of mass.

• Balancing chemical equations ensures that the mass is increased on both sides of the equation

• Mass is destroyed in a chemical reaction, so balancing chemical equations is not necessary

Balance the following chemical equation: H2 + O2 → H2O

• H2 + O2 → H2O2

• H2O → H2 + O2

• H2O2 → H2 + O2

• H2 + O2 → 2H2O

What is a synthesis reaction? Provide an example.

• Combination of iron and oxygen to form iron(II) oxide

• Combination of iron and sulfur to form iron(II) sulfide

• Separation of iron and sulfur to form iron(II) sulfide

• Combination of iron and water to form iron(II) hydroxide

What is a decomposition reaction? Provide an example.

• Example: The decomposition of hydrogen peroxide into water and oxygen gas.

• Example: The displacement of hydrogen peroxide into water and oxygen gas.

• Example: The combustion of hydrogen peroxide into water and oxygen gas.

• Example: The combination of hydrogen peroxide into water and oxygen gas.

Balance the following chemical equation: Fe + O2 → Fe2O3

• Fe + O2 → Fe2O3

• Fe2O2 → FeO

• Fe + O2 → Fe3O2

• FeO + O → Fe2O3

What is a single displacement reaction? Provide an example.

• Zn + 2HCl → ZnCl2 + H2

• 2H2O → 2H2 + O2

• 2Na + 2H2O → 2NaOH + H2

• H2O + CO2 → H2CO3

What is a double displacement reaction? Provide an example.

• The reaction between sulfuric acid and sodium hydroxide to form sodium sulfate and water

• The reaction between iron and oxygen to form iron oxide

• The reaction between water and carbon dioxide to form carbonic acid

• An example of a double displacement reaction is the reaction between silver nitrate (AgNO3) and sodium chloride (NaCl) to form silver chloride (AgCl) and sodium nitrate (NaNO3).

Balance the following chemical equation: NaCl + AgNO3 → AgCl + NaNO3

• 2NaCl + 2AgNO3 → 2AgCl + 2NaNO3

• NaCl + 2AgNO3 → AgCl + 2NaNO3

• 2NaCl + AgNO3 → 2AgCl + 2NaNO3

• 2NaCl + AgNO3 → AgCl + NaNO3

What is a combustion reaction? Provide an example.

• Freezing of water to form ice

• Heating of water to produce steam

• Burning of methane (CH4) in the presence of oxygen to produce carbon dioxide and water.

• Mixing of two liquids to form a solid