NG WAH CATHOLIC SECONDARY SCHOOL S.6 Chemistry 2020 ...

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NG WAH CATHOLIC SECONDARY SCHOOL

S.6 Chemistry

2020-2021 Teaching Schedule

A. Teaching Schedule

September-November

1st Term : Book 4A X. Chemical Equilibrium (Chapter 39-41)

Book 4B XI. Chemistry of Carbon Compounds (Chapter 42-46)

Book 4B XII. Patterns in the Chemical World (Chapter 47-49)

First Term Examination December-February 2nd Term : Book 5 XIII. Industrial Chemistry (Chapter 50-55)

Book 6 XIV. Materials Chemistry (Chapter 56-60)

Revision (Chapter 1-60)

Final Examination

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S.6 Chemistry

2020-2021 Assessment Policy

Assessment (Date) Term 1 Assessment

(November)

Term 2 Assessment

(January)

Yearly Total (100%) 50% 50%

Composition

FA=30%

SA=70%

FA_CO

(1.5%)

FA_A

(4.5%)

FA_CT

(4.5%)

FA_UQ

(4.5%)

SA

(35%)

FA_CO

(1.5%)

FA_A

(4.5%)

FA_CT

(4.5%)

FA_UQ

(4.5%)

SA

(35%)

Duration (SA) 1 Paper : 2 hours Paper 1 : 2.5 hours Paper 2 : 1 hour

Scope (SA) SA = Topics (Ch 39~49) SA = Topics (Ch 1~60)

Formative Assessment (FA) = Class Observation(CO) + Assignment(A) + Class Tests(CT) + Uniform Quizzes(UQ) → Ratio = 1:3:3:3

Summative Assessment (SA) = Examination

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Level descriptors for Class Observation (Max marks = 2)

Grade Level Descriptors Marks of Class Observation

A ⚫ Always bring textbooks/notes (record : 100%)

⚫ Very good interaction with teachers on Q & A (impression marking)

⚫ Practical : Very good manipulative skills, observation skill & attitude (impression marking) 2

B ⚫ Usually bring textbooks/notes (record : ~ 80%)

⚫ Good interaction with teachers on Q & A (impression marking)

⚫ Practical : Good manipulative skills, observation skill & attitude (impression marking) 1.5

C ⚫ Often bring textbooks/notes (record : ~ 50%)

⚫ Average interaction with teachers on Q & A (impression marking)

⚫ Practical : Average manipulative skills, observation skill & attitude (impression marking) 1

D ⚫ Sometimes bring textbooks/notes (record : ~ 20%)

⚫ Weak interaction with teachers on Q & A (impression marking)

⚫ Practical : Weak manipulative skills, observation skill & attitude (impression marking) 0.5

F ⚫ Never bring textbooks/notes (record : 0%)

⚫ Very weak interaction with teachers on Q & A (impression marking)

⚫ Practical : Very weak manipulative skills, observation skill & attitude (impression marking) 0

Conversion table for Assignments (Grade to Mark) (Scale : Max marks = 6)

Grade Marks of Assignments

A 6

B 4 / 5

C 2 / 3

D 1

F 0

Conversion formulae for marks of Tests/Quizzes/Assignments ⚫ For each quiz/assignment, the mark is first converted to 6 marks.

⚫ Take average of all the tests/quizzes/assignments.

⚫ Late/Non- submission of assignments : Mark deduction

(a) Student submits his assignment(s) before the teacher’s distribution of assignment(s) → Marks deducted to 50 %

(b) Student submits his assignment(s) after the teacher’s distribution of assignment(s) → Marks deducted to 30 %

(c) Student doesn’t submit his assignment(s) at all → Marks deducted to 0 %

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S.6 Chemistry (1X)

2020-2021 Homework Policy

S6 : At least 1 homework per chapter + At least 1 classwork per chapter + Other materials

(At least 3 assignments per month)

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NSS Chemistry/CS-Chem School-based Assessment

⚫ What are the assessment tasks for School-based Assessment (SBA) in NSS Chemistry?

SBA for NSS Chemistry includes the following elements:

a. Practical related task: Basic Chemical Analysis, Experiment and Investigative Study.

b. Non-practical related task: Assignment.

⚫ What are the assessment tasks for SBA in NSS Combined Science (Chemistry Part)?

SBA for NSS Combined Science (Chemistry) includes the following elements:

a. Practical related task: Volumetric Analysis and Experiment.

b. Non-practical related task: Assignment.

⚫ What kinds of assignments are expected for the non-practical related tasks of SBA?

The tasks should be related to one or more topics of the curriculum, and involve one or more of the generic skills such as creativity, critical

thinking skills, communication skills and problem-solving skills. Examples of such tasks include critical reading and writing, poster design and

production of multimedia artifact.

BAC (Qualitative analysis)

BAC (Qualitative analysis) (Version 1)

Link with NSS curriculum:

Topic IV (Acids and Bases)

Number of period required

1 40 minutes

Experimental work: 20 minutes

Prior knowledge

sub-sections (a) and (d) of topic IV

Objective

To test the students’ knowledge on precipitation reactions and acid-carbonate reactions

Assessment:

Mainly based on the written worksheet

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Assessment considerations

Mainly based on written worksheets

Any unsafe practice?

Marks to be deducted

With prior notice

BAC (Qualitative analysis) (Version 2)

Link with NSS curriculum

Topic IV (Acids and Bases); Topic VII (Redox reactions)

Number of periods required

1 40 minutes

The students are able to complete the experiment and hand in the worksheet within 30 minutes.

Deduction of an unknown sample

Note: 2/3 of the marks are allocated to the observations. 1/3 of the marks are allocated to the interpretation of the observations and the

deduction of the chemical nature of the sample.

Summarise, in the space below, your conclusions as to the chemical nature of the sample. Deduce, where possible, what ionic and / or

molecular species are present in the sample.

Mark Remarks

10 - 9 Accurate description of nearly all results. Logical deduction of the unknown. Safety procedures have been observed.

8 – 6 Accurate description of some results. Can deduce the cation / anion logically. Safety procedures have been observed.

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5 – 3 Accurate description of at least one result. Can state the cation / anion.

2 – 1 Accurate description of one result OR Can state the cation / anion.

BAC (Volumetric Analysis)

Topic IV Acids and Bases

Topic XV Analytical Chemistry

Assessment areas

◼ Manipulate titration apparatus

◼ pipette

◼ burette

◼ conical flask

◼ volumetric flask

◼ electrical balance

◼ Detection of end point

◼ Calculations

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pipette

◼ Washing

◼ tap water

◼ deionised water

◼ solution to be transferred

◼ Transfer solution via pipette

Burette

◼ Washing

◼ tap water

◼ deionised water

◼ solution to be filled in

◼ Air bubbles

◼ Control the burette

◼ Reading : 0.02 cm³

Conical flask / volumetric flask

◼ Washing

◼ tap water

◼ deionised water

Case I ◼ Technique approach

◼ Four experiments are arranged

◼ HCl(aq) vs NaOH(aq)

◼ Preparation of standard Na2CO3(aq)

◼ Titration of Na2CO3(aq) vs HCl(aq)

◼ Titration of CH3CO2H(aq) vs NaOH(aq)

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Experiment 1

◼ Titration : HCl(aq) vs NaOH(aq)

◼ Pipette and pipette filler

◼ Burette, conical flask

◼ Burette reading 0.02 cm³

◼ End point of titration

◼ methyl orange

Experiment 2

◼ Preparation

◼ standard Na2CO3(aq) solution

◼ Weighing bottle, electrical balance

◼ Dissolve the solid

◼ Pour the solution into a volumetric flask

◼ Graduation mark of volumetric flask

Experiment 3

◼ Titration

◼ Na2CO3(aq) vs HCl(aq)

◼ pipette

◼ burette

◼ end point

◼ methyl red

Experiment 4 (a)

◼ Assessment

◼ Titration : CH3CO2H(aq) vs NaOH(aq)

◼ (I) Dilution of a vinegar solution

◼ pipette


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Experiment 4 (b)

◼ Assessment

◼ (II) Titration :

◼ dilute vinegar solution vs NaOH(aq)

◼ Pipette




◼ phenolphthalein

◼ Calculations

Case II ◼ Concept approach

◼ Three experiments are arranged

◼ Preparation of Na2CO3(aq)

◼ Titration of Na2CO3(aq) vs HCl(aq)

◼ Titration of HCl(aq) vs NaOH(aq)

Experiment 1

◼ Preparation

◼ standard Na2CO3(aq) solution

◼ Weighing bottle

◼ Dissolving the solid

◼ Pour the solution into a volumetric flask

◼ Graduation mark of volumetric flask

Experiment 2

◼ Titration

◼ Na2CO3(aq) vs HCl(aq)

◼ pipette and pipette filler

◼ burette, conical flask

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◼ end point

◼ methyl orange

Experiment 3 (a)

◼ Assessment

◼ Titration : HCl(aq) vs NaOH(aq)

◼ (I) Dilution of a NaOH(aq) solution

◼ pipette


Experiment 3 (b)

◼ Assessment

◼ (II) Titration :

◼ dilute NaOH(aq) vs HCl(aq)

◼ Pipette




◼ methyl red

◼ Calculations

Case III ◼ Concept approach

◼ Three experiments are arranged

◼ Preparation of oxalic acid, HO2CCO2H(aq)

◼ Titration of HO2CCO2H(aq) vs NaOH(aq)


Experiments

◼ Titration of oxalic acid vs NaOH(aq)

◼ phenolphthalein


◼ methyl orange

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Marking Criteria

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NG WAH CATHOLIC SECONDARY SCHOOL S.6 Chemistry 2020 ...

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