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

ASSESSMENT OBJECTIVES

(SECTION 5.3 OF C&A GUIDE)

2014 HKDSE Paper I Q7

INTEGRATE SBA IN LEARNING

AND TEACHING

Example 1

Pre-lab assignment +

Volumetric analysis using HCl(aq) and Na2CO3(aq)

PRE-LAB ASSIGNMENT

To ensure students to watch the video and

understand the experimental procedures

To enable teachers to check students’

understanding and misconception, and provide

timely support

2. Answer questions such as:

- Briefly describe how to prepare

standard sodium carbonate

solution from solid sodium

carbonate

- Calculate the amount of solid

sodium carbonate needed for

preparing 250 cm3 0.20 mol dm-3

sodium carbonate solution

In preparing students for VA assessment

1. Watch the related video

INTEGRATE SBA IN LEARNING

AND TEACHING

Example 2

To study how concentration affects the rate of a

reaction using datalogger +

Post-lab assignment

TO STUDY HOW CONCENTRATION AFFECTS

THE RATE OF A REACTION USING

DATALOGGER

pH of solution is 8.2 – 12:

H2Ph(aq) + 2OH(aq) → Ph2-(aq) + 2H2O(l) (fast)

phenolphthalein

colourless pink

pH of solution is above 12:

Ph2-(aq) + OH-(aq) PhOH3-(aq) (slow)

pink colourless

SAMPLE ABSORBANCE – TIME CURVES

2015 HKDSE Paper I Q9

POST-LAB ASSIGNMENT

To consolidate students’ understanding on the

concepts involved in the experiment

To enable teachers to check students’ understanding

and misconception, and provide timely support

2015 HKDSE Paper I Q9

INVESTIGATIVE STUDY

Assessment requirement for Chemistry:

Investigative Study can be done in lieu of Other

Experiments. One assessment on ‘proposal’ and one

assessment on ‘process and report’ should be

performed. These two assessments can satisfy the

minimum requirement for Other Experiments.

Investigative Study in

Chemistry – Exemplars of

Learning and Teaching Activities

(HKUST, EDB & HKEAA, 2009) School-based Assessment Sample Tasks

Objectives: To investigate the effect of the use of

catalyst on reaction rate and compare the effectiveness

of different catalysts on the decomposition of H2O2

Possible catalysts:

KI(aq) / MnO2(aq) / Celery / Pig Liver ….

INVESTIGATION - CATALYSTS FOR THE DECOMPOSITION OF HYDROGEN PEROXIDE

THE EXPERIMENT

to data logger OR

to gas syringe Plant extract (potato)

One of the following catalysts:

Powdered manganese(IV) oxide

(MnO2)

Fresh potato extract

Fresh celery extract

A small piece of fresh pig liver

1 M Fe(NO3)3(aq) / FeCl3(aq)

1 M KI(aq) Adding catalyst into 100 cm3

H2O2(aq)

EXPERIMENT RESULT

http://edblog.hkedcity.net/nsschem

http://minisite.proj.hkedcity.net/edbosp-sci/eng/home.html

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)

CHEMISTRY EXPERIMENTAL TECHNIQUES

http://minisite.proj.hkedcity.net/safetyonline/eng/index.html

LEARNING, TEACHING AND ASSESSMENT OF SBA OF

CHEMISTRY AND COMBINED SCIENCE (CHEMISTRY PART)

PRACTICAL RELATED TASKS FOR NEW TEACHERS

(RE-RUN)

(CDI020160286)

Date: 30/10/2015 (Friday)

Time: 2:00pm – 5:00pm

Venue: EDB Kowloon Tong Education Services Centre

CONTACT INFORMATION

Dr Raymond Fong

Tel: 3698 3436

Email: raymondfong@edb.gov.hk

Tim Tse

Tel: 3698 3438

Email: timbltse@edb.gov.hk

Sophia Cheng

Tel: 3698 3439

Email: sophiaslcheng@edb.gov.hk