LEARNING AND TEACHING RESOURCES ON PRACTICAL FOR CHEMISTRY AND COMBINED SCIENCE (CHEMISTRY PART) Sophia SL Cheng Science Education Section, EDB

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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 1. Inquiry-based Chemistry Experiments (CUHK & EDB, 2002) 2. Learning and Teaching Activities for the Revised Sixth Form Chemistry Curriculum (EDB, 2005) Examples of experiments for SBA tasks 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. Investigative Study in Chemistry Exemplars of Learning and Teaching Activities (HKUST, EDB & HKEAA, 2009) 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) 5. Resource Book for Sixth-Form Practical Chemistry (CUHK, EDB & HKEAA, 2004) 6. Workshops on Implementing Microscale Chemistry Experiments (HKBU & EDB, 2008-2010) 4. Synthesis of isoamyl acetate (banana oil) Isolation of chlorophyll from spinach 5. Calcium carbonate in eggshell (Inquiry-based) Alcohol breath analysis 6. Reactivity series of magnesium, zinc and copper Chemical cells / fuel cell 7. Experiments of Microscale Analytical Chemistry and Microscale Organic Chemistry for Secondary Schools (HKUST & EDB, 2011) 7. Microscale separation of components in a mixture

CHEMISTRY EXPERIMENTAL TECHNIQUES

ASSESSMENT OBJECTIVES (SECTION 5.3 OF C&A GUIDE)

THIN-LAYER CHROMATOGRAPHY OF PAINKILLERS Solvent for dissolving tablet ingredients: 1:1 ethanol & dichloromethane Developing solvent for TLC: ethyl ethanoate Part A: caffeine; aspirin; caffeine & aspirin mixture

Part B: caffeine & aspirin mixture; two brands of painkillers Brand of Analgesics Acetylsalicyclic Acid (aspirin) Ingredient Acetaminophen (paracetamol) Caffeine Panadol ( 必理痛 ) Fortolin ( 幸福止痛素 ) Coltalin Cold & Flu ( 幸福傷風素 ) Saridon ( 散利痛 ) Cortal ( 克痛 )

Iodine chamber

Part A Part B Short wavelength UV lamp (254 nm)

TO STUDY HOW CONCENTRATION / TEMPERATURE AFFECTS THE RATE OF A REACTION ph of solution is 8.2 12: H 2 Ph(aq) + 2OH (aq) Ph 2- (aq) + 2H 2 O(l) (fast) phenolphthalein colourless pink ph of solution is above 12: Ph 2- (aq) + OH - (aq) PhOH 3- (aq) (slow) pink colourless

Chemicals: 2 M NaOH(aq), 2 M NaCl(aq), 0.1% phenolphthalein in ethanol Apparatus and Equipment: Test tube, 10 ml measuring cylinder, Test-tube rack, Plastic dropper, Test-tube stopper, Stop-watch, 50 ml beaker, 1 ml graduated micro-syringe

Effect of concentration on the reaction rate Tube NaOH(aq) / ml NaCl(aq) / ml Time needed for the pink colour to disappear / s A 5 0 B 4 1 C 3 2 D 2 3 E 0 5 (Control) Please refer to Notes for Teachers for the sample results. Effect of temperature on the reaction rate Tube NaOH(aq) / ml NaCl(aq) / ml Temperature / o C Time needed for the pink colour to disappear / s P 5 0 0 Q 5 0 (Room temperature) R 5 0 50 S 0 5 (Room temperature) (Control)

http://edblog.hkedcity.net/nsschem

HTTP://MINISITE.PROJ.HKEDCITY.NET/EDBOSP-SCI/ENG/HOME.HTML (WWW.HKEDCITY.NET/EDBOSP)

References and resources for Chemistry, Science Education Section, EDB (http://www.edb.gov.hk/en/curriculum-development/kla/science-edu/ref-and-resources/index.html)

NSS CURRICULUM REVIEW: NSS UNDERSTANDING AND INTERPRETING THE CHEMISTRY AND COMBINED SCIENCE (CHEMISTRY PART) CURRICULA (REFRESHED) (CDI020140064) Date: 29/10/2013 (Tuesday) Time: 2:00pm 5:00pm Venue: EDB Kowloon Tong Education Services Centre

COURSE FOR LABORATORY TECHNICIANS: NSS UNDERSTANDING AND INTERPRETING THE CHEMISTRY AND COMBINED SCIENCE (CHEMISTRY PART) CURRICULA (REFRESHED) (CDI020140065) Date: 8/11/2013 (Friday) Time: 2:15pm 4:15pm Venue: EDB Kowloon Tong Education Services Centre

THE CHEMISTS ONLINE SELF-STUDY AWARD SCHEME 化學家在線 自學獎勵計劃 18 seminars delivered by experts of local universities Students attend seminars online and engage in online exercises related to the seminars Award Number of seminars completed within the designated period Bronze 3 Silver 6 Gold 9 Platinum 12 For details please refer to EDBCM Application for Participation in Educational Activities and Events (November 2013) to be released on 1-11-2013

CONTACT INFORMATION Dr Raymond Fong Tel: 3698 3436 Email: raymondfong@edb.gov.hk Sophia Cheng Tel: 3698 3439 Email: sophiaslcheng@edb.gov.hk Office: Science Education Section, E232, EDB Kowloon Tong Education Services Centre

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