Measuring rate of reaction (practical)

Question 1

Formula for rate of reaction

Answer 1

Rate of reaction=Amount of reaction used or amount of product formed/Time

Question 2

How can you test rate of reaction

Answer 2

If the reactants are coloured and products are colourless you can time how long it takes for the solution to lose its colour

Question 3

How can you test for a Change in mass

Usually gas gives off

Answer 3

1. Measure the speed of a reaction that prodcues a gas
2. As the gas is released, the mass disappearing is measured on the balance
3. The quicker the reading on the balance drops the faster the reaction
4. if you take measurements at regular intervals, you can plot a rate of reaction graph

Question 4

How do you measyre the rate of reaction

The volume of gas given off

Answer 4

1. Involves the use of a gas syringe to measure the volume of gas given off
2. The more gas given off during a given time interval, the faster the reactiion
3. Gas syringes usually give volumes accruate to the nearest cm^3
4. take measurements at regular time intervals and plot a graph