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Chemistry
School Based Assessment
Leung Siu Wai
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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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