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LEARNING AND TEACHING RESOURCES ON PRACTICAL FOR
CHEMISTRY AND COMBINED SCIENCE (CHEMISTRY PART)
Sophia SL Cheng
Science Education Section, EDB
Resource materials Examples of experiments for SBA tasks
1. Inquiry-based Chemistry Experiments
(CUHK & EDB, 2002)
2. Learning and Teaching Activities for the
Revised Sixth Form Chemistry Curriculum
(EDB, 2005)
3. Investigative Study in Chemistry –
Exemplars of Learning and Teaching Activities (HKUST, EDB & HKEAA, 2009)
1.
• Identification of white solids
2.
• Determination of the heat of combustion of alcohols
• Relative molecular mass of butane
• Concentration effect and reaction rate
3.
• Getting copper from its ore
• Making your own acid-base indicator
• How to make it hot?
4. Workshops on Miniature Practical
Chemistry (HKUST & EDB, 2008)
4.
• Synthesis of isoamyl acetate (banana oil)
• Isolation of chlorophyll from spinach
5. Resource Book for Sixth-Form Practical
Chemistry (CUHK, EDB & HKEAA, 2004)
5.
• Calcium carbonate in eggshell (Inquiry-based) • Alcohol breath analysis
6. Experiments of Microscale Analytical
Chemistry and Microscale Organic
Chemistry for Secondary Schools (HKUST &
EDB, 2011)
6. • Microscale separation of components in a mixture
Practical Activities for Chemistry and Combined Science (Chemistry Part)
Acids and Bases
◦ pH Curve (with the use of datalogger)
Mole Concept and Stoichiometry
◦ Decomposition of Baking Soda
◦ Determining the Stoichiometry of Reaction
Between ClO- and S2O32- / OH-
SBA
Rate of Reaction
To Study How Concentration/Temperature Affects the Rate
of Reaction
Reaction of Phenolphthalein in NaOH solution (with the use
of datalogger)
Catalysts for the Decomposition of H2O2 (with the use of
datalogger)
Elephant Toothpaste – Effect of Catalyst on Reaction Rate
Microscopic World II
Evaporation and Intermolecular Attractions
Preparation of “Slime”
Analytical Chemistry
Thin-layer Chromatography of Painkillers
SBA
SBA
SBA
SBA
SBA
INTEGRATE SBA IN LEARNING AND TEACHING
Example 1
Pre-lab assignment +
Volumetric analysis using HCl(aq) and Na2CO3(aq)
2016 HKDSE Paper I Q9
Three unlabeled reagent bottles each contains one of the white solids listed below:
ZnSO4 MgSO4 MgSO4.7H2O
Outline how you would carry out tests to distinguish these three solids.
(6 marks)
2015 HKDSE Paper I Q5
Explain, with the aid of a chemical equation, why NH3(aq) is regarded as a weak
alkali. Suggest how you would show that NH3(aq) is a weaker alkali than NaOH(aq)
through an experiment.
(6 marks)
http://ifile.hkedcity.net/1/001/926/genre/guides-c.html
2016 HKDSE Paper II Q3(b)
Objective
• To determine the amount of copper in a brass sample
Chemical reactions
3Zn + 2NO3- + 8H+ 3Zn2+ + 2NO + 4H2O
3Cu + 2NO3- + 8H+ 3Cu2+ + 2NO + 4H2O
2NO + O2 2NO2
The determination of copper in brass
The determination of copper in brass
Instrumental method
The determination of copper in brass
Deionised water
0.1 M CuSO4(aq)
0.2 M CuSO4(aq)
0.3 M CuSO4(aq)
0.4 M CuSO4(aq)
0.5 M CuSO4(aq)
Sample solution
Voltage reading / V
Relative absorbance
Relative absorbance = log10(V0 / Vs) where V0 is the voltage reading with a cuvette containing just deionised water Vs is the voltage reading with a sample in the cuvette
The determination of copper in brass
Conc. of sample CuSO4(aq) = 0.281 M Mass of Cu in brass solution = 0.178 g
% by mass of Cu in brass sample = 59.3%
◦ http://www.hkeaa.edu.hk/tc/sba/sub_info_sba/dse_subject.html?7&4
http://edblog.hkedcity.net/nsschem
http://minisite.proj.hkedcity.net/safetyonline/eng/index.html
References and resources for Chemistry, Science Education, EDB
(http://www.edb.gov.hk/en/curriculum-development/kla/science-
edu/ref-and-resources/chemistry.html)
Curriculum Documents, Science Education, EDB
(http://www.edb.gov.hk/en/curriculum-development/kla/science-
edu/curriculum-documents.html)
http://cd1.edb.hkedcity.net/cd/science/chemistry_resources/resources.html
Contact information
Dr Raymond Fong
Tel: 3698 3436
Email: [email protected]
Tim Tse
Tel: 3698 3438
Email: [email protected]
Sophia Cheng
Tel: 3698 3439
Email: [email protected]
