Year 10 Science 2024 Semester 1: Chemical Reactions

A chemical reaction occurs when…

One or more substances (reactants) are converted to one or more different substances (products).

Signs of a chemical reaction…

Heat, colour change, light production, precipitate.

An exothemic reaction has a…

Downhill reaction.

An endothermic reaction had an…

Uphill reaction.

The Law of Conservation of Mass states that…

matter cannot be created or destroyed, it can only be changed from one form to another- mass is conserved.

To make a solution you…

Add a solute to a solvent. The solute dissolves in the solvent.

Concentration is…

The amount of solute that has been dissolved in a given volume of solvent or solution.

A solution is dilute when…

The solvent contains a small amount of solute.

A solution is concentrated when…

The solvent contains a large amount of solute.

Synthesis is when…

Two or more reactants combine to produce one compound.

Decomposition is when…

One compound is broken down to produce two or more compounds.

Single displacement is when….

An element and a compound produce an element and a compound.

Double displacement is when…

Two compounds produce two compounds.

Combustion is when…

A carbon compound combines with oxygen to release heat/energy. Carbon dioxide and water are always the products.

Collision theory is used to…

Predict the rates of chemical reations.

For a reaction to be successful, particles must collide with…

Sufficient energy and the correct orientation.

Reaction rate is…

The speed at which the reactants are converted to products in a given unit of time.

What factors affect reaction rate?

Concentration of reactants, surface area of solids, temperature, and adding a catalyst.

In a graph, the IV goes on which axis?

The X axis.