Be Preserved from Preservatives

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Hong Kong Chemistry Olympiad 2008-2009 Water
Tips for doing your project

La Salle College
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Topics listed in this PowerPoint are for
references only.

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Four major tips

• Choosing a special topic
• Simple Experiment
• Time Management
• In Detail

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Choosing a special topic

• Innovative topic
• Not too common

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• Reason The first one is too common

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Choosing a special topic

• Broad

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• Reason It is more meaningful to discuss a
  general case rather than specific cases

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Choosing a special topic

• Relevant

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• Reason
• Permanent clothing dye ? Colorings do not
  contaminate water ? Less water pollution
  (Indirect)
• (Direct)

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Simple Experiment

• Design experiments that is able to be performed
  by secondary school students
• Better understanding of details
• Precautions
• Qualitative/ Quantitative
• Advantages/ Disadvantages
• Example
• Titration (Redox/ Acid-Base/ Back)
• Distillation, Reflux, Melting point determination

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Simple Experiment

• Example
• A1 Titration of Chrysanthemum tea (different
  treatment)
• A2 Titration of food samples
• B1 Standard reference colour card by using sodium
  sulphite (Part I/II)
• B2 Standard reference colour card by using sodium
  bisulphite
• C1 Testing whether HCl is essential in the
  colorimetric method
• C2 Determination of the mass of citric acid
  powder should be used in the colour test
• C3 Optimum testing time
• D1 Comparison of result in titration and
  colorimetric method
• D2 To determine the sulphur dioxide of the food
  product by colorimetric method

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Time management

• Plan your time well
• Dont expect your progress will be smooth!
• Examination or Competition?
• Accident? (Plan for the worst)
• Please be devoted!!

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In Detail

• Content of written report
• Survey (optional)
• Questionnaire
• Discussion and Conclusion
• Lab Reports
• Objective
• (Principle of Method)
• Procedures involved
• Data Analysis -gt conclusion
• Error Analysis and Improvements

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In Detail

• Survey
• Internet survey
• www.my3q.com/
• School survey

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In Detail

• Lab Reports
• Organize your lab reports into sets / parts
• (22 pages)

Titration

Sulphur dioxide
Colorimetric
Testing Kit
Evaluation
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In Detail

• Report Example

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Thank you!
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