Salters Advanced Chemistry Individual Investigation

1
Salters Advanced ChemistryIndividual
Investigation

• Recording information, doing calculations and
  drawing graphs

2
Recording Information

• Record data and information as you collect it
• Use a specially dedicated book, not a flimsy
  piece of paper
• Date each entry

3
Recording Data

• Record data in tables
• Record all data, not just averages
• e.g. include start and end burette readings not
  just titres from a titration
• Use detailed headings so it is clear what you are
  recording
• Include appropriate units

4
Recording Data

• If your data is poor quality, repeat the
  experiment, modifying conditions if needed
• Example 1 - low titres from a titration
• Example 2 - Gas given off too quickly or too
  slowly
• Clock reaction goes too quickly or too slowly

5
Calculations

• You will need to know how to calculate the number
  of moles and the concentrations of solutions you
  are using
• If you are using a titration you will need to
  know how to do calculations arising from them

6
Graphs

• Plot graphs from data you have collected straight
  away Dont leave it until later
• By all means use Excel but take care with the
  detail

7
Graphs

• Make sure graphs use the full page
• Include a detailed heading not just Experiment
  5
• Label axes and include units
• Think about drawing in the line by hand

8
Graphs

• For kinetics experiments know the range of graphs
  you can draw including log graphs and use of
  kinetic half life
• For kinetics experiments know how to find
  activation enthalpy from an Arrhenius plot