chemistry school based assessment -...

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Chemistry

School Based Assessment

Leung Siu Wai

swaleung@gmail.com

30th October, 2015

WE MUST DO !

What? When? & How?

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Qualitative Analysis (S5 QA)

Volumetric Analysis (S5 VA)

Redox Reactions (S5 / S6 EXPT)

Enthalpy Changes of Combustion of Alcohols (S5 EXPT)

Concentration Change on Reaction Rate (S5 EXPT)

Organic Reactions (S6 EXPT)

Practical Tasks ....... What Do We Do? List

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Qualitative Analysis (S5 QA) #1

Volumetric Analysis (S5 VA)

Redox Reactions (S5 / S6 EXPT)

Enthalpy Changes of Combustion of Alcohols (S5 EXPT)

Concentration Change on Reaction Rate (S5 EXPT)

Organic Reactions (S6 EXPT)

Practical Tasks ....... What Do We Do?

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Qualitative Analysis (S5 QA)

Volumetric Analysis (S5 VA)

Redox Reactions (S5 / S6 EXPT)

Enthalpy Changes of Combustion of Alcohols (S5 EXPT)

Concentration Change on Reaction Rate (S5 EXPT)

Organic Reactions (S6 EXPT)

Practical Tasks ....... What Do We Do?

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S4 Post-examination Activities

Volumetric Analysis Training (S4)....... When ?

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Reminders:

Preparing Standard Solution #2

Process of Titration #3

List of Apparatus #4

Word with –ette endings

Pipette

Burette

50 cm3 beaker (SB matches with Pipette)

100 cm3 beaker (LB matches with Burette)

Students Demonstration

Volumetric Analysis Training (S4)....... How ?

Must be rinsed with solution

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Background information

Theory of Clock reaction AL Questions

Worksheet #5

Manual #6

Movie Clip ILPAC (4 mins)

Volumetric Analysis Training (S4)....... How?

Determining the Stoichiometry of the Reaction

between I2(aq) and S2O32-(aq)

a Na2S2O3(aq) + b I2(aq) Products

I2(aq) + I-(aq) I3

-(aq) Brown complex ions I2(aq) + 2S2O3

2-(aq) 2I- (aq) + S4O62- (aq)

tetrathionate ions

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Floor Plan and Schedule #7

List of Appratus #4

Mark Scheme #8

Volumetric Analysis SBA (S5 VA)....... How?

Determine the concentration of iodine solution by a

standard sodium thiosulphate solution

I2(aq) + I-(aq) I3-(aq) Brown complex ions

I2(aq) + 2S2O3 2-(aq) 2I- (aq) + S4O6

2- (aq) tetrathionate ions

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List of Appratus #9

Mark Scheme #10

Volumetric Analysis SBA (S5 VA)....... How?

Determine the concentration of potassium

permanganate

5Fe2+(aq) + MnO4-(aq) + 8H+(aq)

5Fe3+(aq) + Mn2+(aq) + 4H2O(l)

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Qualitative Analysis (S5 QA)

Volumetric Analysis (S5 VA)

Redox Reactions (S5 / S6 EXPT)

Enthalpy Changes of Combustion of Alcohols (S5 EXPT)

Concentration Change on Reaction Rate (S5 EXPT)

Organic Reactions (S6 EXPT)

Practical Tasks ....... What Do We Do?

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Redox Reactions (S5 / S6 EXPT)....... How?

Investigating Redox Reactions of Chlorine gas

Investigating Redox Reactions of Sulphur Dioxide

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Cl2(g)

SO2(g)

List of Apparatus (1)

List of Apparatus (2)

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Mark Scheme (Chlorine gas) #11

Mark Scheme (Sulphur dioxide gas) #12

Redox Reactions (S5 / S6 EXPT)....... How?

Investigating Redox Reactions of Chlorine gas

Investigating Redox Reactions of Sulphur Dioxide

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Qualitative Analysis (S5 QA)

Volumetric Analysis (S5 VA)

Redox Reactions (S5 / S6 EXPT)

Enthalpy Changes of Combustion of Alcohols (S5 EXPT)

Concentration Change on Reaction Rate (S5 EXPT)

Organic Reactions (S6 EXPT)

Practical Tasks ....... What Do We Do?

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Enthalpy Changes of Combustion of Alcohols

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Enthalpy Changes of Combustion of Alcohols

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Written Practical Assessment

Question Paper #13

Mark Scheme #14

Enthalpy Changes of Combustion of

Alcohols (S5 EXPT) ....... How?

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Qualitative Analysis (S5 QA)

Volumetric Analysis (S5 VA)

Redox Reactions (S5 / S6 EXPT)

Enthalpy Changes of Combustion of Alcohols (S5 EXPT)

Concentration Change on Reaction Rate (S5 EXPT)

Organic Reactions (S6 EXPT)

Practical Tasks ....... What Do We Do?

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Investigating Effect of Concentration on Reaction Rate

S2O32-(aq) + 2H+(aq) SO2(g) + S(s) + H2O(l)

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Investigating Effect of Concentration on Reaction Rate

S2O32-(aq) + 2H+(aq) SO2(g) + S(s) + H2O(l)

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Investigating Effect of Temperature on Reaction Rate

S2O32-(aq) + 2H+(aq) SO2(g) + S(s) + H2O(l)

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Investigating Effect of Temperature on Reaction Rate

S2O32-(aq) + 2H+(aq) SO2(g) + S(s) + H2O(l)

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Written Practical Assessment

Question Paper #15

Mark Scheme #16

Concentration Change on Reaction

Rate (S5 EXPT)....... How?

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Qualitative Analysis (S5 QA)

Volumetric Analysis (S5 VA)

Redox Reactions (S5 / S6 EXPT)

Enthalpy Changes of Combustion of Alcohols (S5 EXPT)

Concentration Change on Reaction Rate (S5 EXPT)

Organic Reactions (S6 EXPT)

Practical Tasks ....... What Do We Do?

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Qualitative Analysis (S5 QA)

Volumetric Analysis (S5 VA)

Redox Reactions (S5 / S6 EXPT)

Enthalpy Changes of Combustion of Alcohols (S5 EXPT)

Concentration Change on Reaction Rate (S5 EXPT)

Organic Reactions (S6 EXPT)

Practical Tasks .......

What ? When ? How ?

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I hear …. I forget. I see …. I remember. I do …. I understand.

Practical Tasks .......

Why Do We Do?

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Thank You !

Leung Siu-wai Anita swaleung@gmail.com

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Spare Time Left Extended Elaboration

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

Chemistry Experimental Techniques (化學實驗技巧 )

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Determining the concentration of chloride ions in a sea water

Determining the sodium hypochlorite content in a bleach

More Practical Tasks on

Volumetric Analysis .......

When Do We Do? How Do We Do?

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

Chemistry Experimental Techniques (化學實驗技巧 )

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Synthesis of 3-Methyl-1-butyl ethanoate (Fragrance of Banana)

Oxidizing ethanol to ethanoic acid and testing the ethanoic acid produced

Preparing and purifying 2-chloro-2-methylpropane

Organic Synthesis

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Synthesis of 3-Methyl-1-butyl ethanoate

Fragrance of Banana

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Thank You !

Leung Siu-wai Anita swaleung@gmail.com