Chemical Reactions

What are the five main types of chemical reactions?

• Combination (Synthesis) Reactions, Decomposition Reactions, Single Replacement (Substitution) Reactions, Double Replacement (Metathesis) Reactions, Combustion Reactions

• Polymerization Reactions

• Neutralization Reactions

• Oxidation Reactions

What is a synthesis reaction?

• A synthesis reaction is a type of chemical reaction that involves the separation of substances

• A synthesis reaction is a type of biological reaction

• A synthesis reaction is a type of physical reaction

• A synthesis reaction is a type of chemical reaction in which two or more simple substances combine to form a more complex product.

Give an example of a decomposition reaction.

• Hydrogen peroxide -> Water + Oxygen gas

• Calcium carbonate -> Calcium + Carbon dioxide

• Sodium chloride -> Sodium + Chlorine gas

• Carbon dioxide -> Carbon + Oxygen gas

Explain what a single displacement reaction is.

• A single displacement reaction involves the formation of a new compound with two elements.

• A single displacement reaction involves one element replacing another element in a compound.

• A single displacement reaction involves two elements exchanging places in a compound.

• A single displacement reaction involves the removal of an element from a compound.

Provide an example of a double displacement reaction.

• The reaction between copper sulfate and zinc

• The reaction between silver nitrate and sodium chloride

• The reaction between iron and sulfur

• The reaction between hydrochloric acid and magnesium oxide

What is a combustion reaction?

• A combustion reaction is a physical change that releases energy.

• A combustion reaction is a biological process involving photosynthesis.

• A combustion reaction is a chemical reaction that involves a fuel and an oxidant reacting to produce heat, light, and new chemical products.

• A combustion reaction is a chemical reaction that involves the formation of water only.

Describe what a redox reaction involves.

• A redox reaction involves the transfer of electrons between reactants.

• A redox reaction involves the release of protons by reactants.

• A redox reaction involves the formation of new chemical bonds between reactants.

• A redox reaction involves the absorption of electrons by reactants.

What is the difference between endothermic and exothermic reactions?

• Endothermic reactions release heat

• Endothermic reactions are faster than exothermic reactions

• Exothermic reactions absorb heat

• The main difference between endothermic and exothermic reactions is that endothermic reactions absorb heat, whereas exothermic reactions release heat.

How can you identify a precipitation reaction?

• Look for the formation of a solid (precipitate) when two aqueous solutions are mixed.

• Observe a change in color

• Look for a change in temperature

• Listen for a fizzing sound

What role do catalysts play in chemical reactions?

• Catalysts slow down reactions by increasing activation energy.

• Catalysts change the products of reactions.

• Catalysts have no effect on chemical reactions.

• Catalysts speed up reactions by lowering activation energy.