DETERMINATION OF THE GAS CONSTANT - Writing Laboratory Reports
DETERMINATION OF THE GAS CONSTANT – Marking Scheme
Name: ............................ Date: ........................ Maximum marks: 20
OBJECTIVES: [1 mark]
INTRO: [1 mark]
80 to 200 words (> 300 words = -0.5 marks)
METHOD: Reference laboratory manual and mention changes only [1 mark]
RESULTS (show all calculations and units) [9 marks]
|
Weight of magnesium: |
[0.5 mark] |
|
Calculated moles of magnesium used:
|
[1 mark]
|
|
Volume of hydrogen collected: |
[0.5 mark] |
|
Temperature of water: |
[0.5 mark] |
|
Laboratory pressure (atm): (1 atmosphere = 1.013 x 105 pascal) |
[0.5 mark]
|
|
Water vapour pressure: (See Table 1 in Introduction) Graph must be included |
[1 mark]
|
|
Pressure of hydrogen (= Lab. pressure - Water vapour pressure) |
[1 mark]
|
|
Calculation: R = PV = nT |
[2 marks]
|
|
Units, Significant figures etc |
[1 mark]
|
|
% error |
[1 mark]
|
DISCUSSION [5 marks]
300 – 600 words (> 700words = -0.5 marks)
About the experiment and results:
What you have derived from the results- for example-behaviour of gases
Experimental errors: at least 2 valid reasons
Theoretical errors: at least 2 valid reasons
How to minimise the errors:
Other ideas, Applications of this experiment, thinking outside the box
CONCLUSION [2 marks]
80 – 200 words (> 300words = -0.5 marks)
REFERENCES [1 mark]
Use CDU Harvard style or APA6th. More details can be found at http://libguides.cdu.edu.au/cdureferencing
A minimum of 4 relevant references are required.