Rate Equations 3.1.9

Question 1

What is the equation to calculate rate of reaction

Answer 1

Change in concentration of Reactant or products / Time

Question 2

What is the units for rate of reaction (use formula to help)

Answer 2

Mol dm-³ s-¹

Question 3

What is continuous monitoring

Answer 3

A method of measuring rate of reaction
Measure either how quickly reactants are used up or how quickly products are formed at regular time intervals

Question 4

When can colorimetery be used to measure rate of reaction

Answer 4

When the reactants to products goes from colourless to a colour or a colour to colourless

Question 5

How do you carry out a colorimetry practical

Answer 5

• Plot a calibration curve with known concentrations of a substance against absorbance
• Samples from reaction solution taken at regular intervals and absorbance is measured
  -Use the calibration curve to convert the absorbance at each point into a concentration

Question 6

One method to measure rate of reaction is mass loss. If a gas is given off, the system will lose mass. You can measure this at..
Why is cotton wool used here

Answer 6

You can measure this at regular intervals using a mass balance
Cotton wool prevents acid from spitting out and only allows gas to escape

Question 7

Rate equations Samsung notes

Answer 7

Yaya

Question 8

What are the 3 ways you can measure rate of reaction

Answer 8

Colorimetery
Mass loss
Gas production

Question 9

One method of measuring rate of reaction is gas production. What apparatus can be used to collect gas that is produced in a reaction

Answer 9

Gas syringe / Inverted measuring cylinder