Chemical Reactions

What is a chemical reaction?

• A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

• A chemical reaction is a mathematical equation.

• A chemical reaction is a physical change in matter.

• A chemical reaction is a biological process.

What are the different types of chemical reactions?

• Synthesis, Decomposition, Single Displacement, Double Displacement, Combustion

• Oxidation, Reduction, Neutralization

• Solidification, Liquidation, Vaporization

• Addition, Subtraction, Multiplication

Explain the process of combustion as a chemical reaction.

• Combustion is a biological process in plants

• Combustion is a physical reaction involving only heat

• Combustion is a mechanical reaction between two solids

• Combustion is a chemical reaction between a fuel and an oxidant, typically producing heat and light.

Define the term 'catalyst' in the context of chemical reactions.

• A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process.

• A catalyst is a substance that has no effect on the rate of a chemical reaction

• A catalyst is a substance that decreases the rate of a chemical reaction

• A catalyst is a substance that is consumed in the chemical reaction

What is the Law of Conservation of Mass and how does it relate to chemical reactions?

• The Law of Conservation of Mass allows for the total mass of reactants to be less than the total mass of products in chemical reactions

• The Law of Conservation of Mass states that mass can be created or destroyed in chemical reactions

• The Law of Conservation of Mass only applies to solid substances in chemical reactions

• The Law of Conservation of Mass is related to chemical reactions by ensuring that the total mass of the reactants is equal to the total mass of the products.

Describe the role of reactants and products in a chemical reaction.

• Reactants are the substances that undergo change in a chemical reaction, while products are the substances that are formed as a result of the reaction.

• Reactants are the end products of a chemical reaction.

• Products are the substances that initiate a chemical reaction.

• Reactants and products have no relationship in a chemical reaction.

How can you identify a chemical reaction?

• By hearing a sound

• By smelling a fragrance

• By observing changes in color, formation of a precipitate, evolution of gas, or absorption/release of heat.

• By tasting the substance

Provide an example of a chemical reaction and explain the reactants and products involved.

• Combustion of methane (CH4) in the presence of oxygen (O2) to produce carbon dioxide (CO2) and water (H2O).

• Burning wood to create ash

• Heating water to produce steam

• Mixing salt and sugar to form a solution