chemistry rates of reaction

Question 1

Describe how the progress of a chemical reaction can be measured

Answer 1

Volume of gas produced: If the reaction produces a gas, you can measure how quickly the gas is produced over time. This is often done by collecting the gas in a gas syringe or by measuring the displacement of water in an inverted measuring cylinder.
Change in mass: If a reactant is being used up and gas is released, you can measure the mass of the reaction mixture as it changes over time. The mass will decrease as gas escapes.

Question 2

Describe ways of increasing the rate of a reaction

Answer 2

Increase the temperature
Increase the concentration
Decreasing the particle size
Adding a catalyst

Question 3

Describe the term catalyst

Answer 3

A catalyst is a substance that increases the rate of a chemical reaction without being used up or permanently changed. This means that a catalyst can be recovered in its original form at the end of the reaction and used again.

Catalysts work by providing an alternative reaction pathway with a lower activation energy, making it easier for reactants to convert into products. As a result, the reaction happens faster.