Rate of Reaction AQA GCSE Chemistry

Flashcards covering vocabulary related to the rate of reactions in chemistry.

Rate of Reaction

A measure of how quickly reactants are converted into products in a chemical reaction.

Collision Theory

The theory that chemical reactions occur when reactant particles collide with sufficient energy and proper orientation.

Activation Energy

The minimum energy required for a chemical reaction to occur.

Catalyst

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

Mass Loss Method

A technique to measure the rate of reaction by recording the decrease in mass of a reactant.

Gas Collection Method

A method used to measure the volume of gas produced in a reaction over time.

Precipitation Method

A method to measure the rate of reaction by observing the time it takes for a precipitate to form.

Rate Equation

An equation that relates the rate of a reaction to the concentrations of the reactants.

Gradient of a Graph

The slope of a line on a graph, representing the rate of change of a variable.

Factors Affecting Reaction Rate

Factors such as concentration, temperature, surface area, and catalysts that influence how fast a reaction occurs.

Mean Rate of Reaction

The average rate of reaction calculated over a specific time interval.

Molar Gas Volume

The volume occupied by one mole of a gas at standard temperature and pressure (STP), approximately 24,000 cm³/mol.

Successful Collision

A collision between reactant particles that results in a chemical reaction.

Unsuccessful Collision

A collision that does not result in a chemical reaction due to insufficient energy.

Formula Triangle

A tool to help rearrange equations in chemistry for calculating rates of reaction.

Turbidity Measurement

A method used to assess the concentration of a solution by measuring how cloudy it becomes.

Downward Displacement of Water

A technique for collecting gases in which the gas displaces water in an inverted measuring cylinder.

Concentration

The amount of a substance in a given volume; affects the rate of reaction.

Gas Syringe

An apparatus used to accurately measure the volume of gas produced in a reaction.

Kinetic Energy

The energy possessed by a particle due to its motion; influences the reaction rate.