Chemistry - St Francis' Canossian College · NSS Chemistry Curriculum ... 2013 HKDSE Paper IB (1c)...
Transcript of Chemistry - St Francis' Canossian College · NSS Chemistry Curriculum ... 2013 HKDSE Paper IB (1c)...
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ChemistryNew Senior Secondary Curriculum
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NSS Chemistry Curriculum Structure and Time Allocations
Compulsory Part (198 hours)
Elective Part (52 hours)
School-based Assessment (SBA)
(20 hours)
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Compulsory Part
• Planet earth
• Microscopic world I *
• Metals
• Acids and bases
• Fossil fuels and carbon compounds
• Microscopic world II
• Redox reactions, chemical cells and
electrolysis
• Chemical reactions and energy
• Rate of reaction
• Chemical equilibrium
• Chemistry of carbon compounds
• Patterns in the chemical world
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F3 Chemistry Curriculum
•1st Term
– Atomic Structure
– Periodic Table
•2nd Term
–Chemical Bonding
•Ionic Bond
•Covalent Bond
–Mole Calculation
Microscopic World I
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Elective Part• Industrial chemistry
• Materials chemistry
• Analytical chemistry** study any 2 out of 3
(Our school opt for Industrial chemistry & Analytical chemistry)
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6
• Compulsory for all school candidates
• Assessment will begin from S5
• Practical related tasks only
• Different areas involved
� Volumetric Analysis (VA)
� Qualitative Analysis (QA)
� Other Experiments (EXPT)
• Individual work & group work are required
School-based Assessment (SBA)
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7
SBA
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Assessment
Content Weighting Time
Written Exam
Paper 1
Compulsory Part
60 % 2.5 hours
Paper 2
Elective Part
20 % 1 hour
SBA Practical work
20 % continuous assessment
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�master abstract concepts (e.g. electron, atom, molecule, intermolecular force, reaction rate, chemical equilibrium, etc.)
Is NSS Chemistry easy or difficult ?
The subject require students to
• understand and applychemistry concepts & knowledge
• memorizequite a number of facts (e.g. symbols,formulae, equations, observations etc)
• do chemistry calculations
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First 20 elements – names & symbols
Name Symbol Name Symbol
Hydrogen H Sodium Na
Helium He Magnesium Mg
Lithium Li Aluminum Al
Beryllium Be Silicon Si
Boron B Phosphorus P
Carbon C Sulphur S
Nitrogen N Chlorine Cl
Oxygen O Argon Ar
Fluorine F Potassium K
Neon Ne Calcium Ca
Memorize a number of facts
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Ionic Compounds – names & formulae
Name Formula
Sodium chloride NaCl
Magnesium oxide MgO
Aluminium nitride AlN
Potassium sulphide K2S
Calcium fluoride CaF2
Aluminium chloride AlCl3
Lithium nitride Li3N
Magnesium nitride Mg3N2
Aluminium oxide Al2O3
Memorize a number of facts
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Chemical reactions and equations
• Reaction between metal and acid
Mg + 2HCl → MgCl2 + H2
2Al + 3H2SO4 → Al2(SO4)3 + 3H2
• Redox reaction2MnO4
- +5SO32- + 6H+
→ 2Mn2+ +5SO42- + 3H2O
Cr2O72-+ 6Fe2+ + 14H+
→ 2Cr3+ + 6Fe3+ + 7H2O
Memorize a number of facts
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Question
The three-dimensional structures of
a compound are shown below.
What is their relationship?
C C
CH3
C2H5
H
Cl CH3
C2H5
H
Cl
Master abstract concepts
Non-superimposable mirror images
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2013 HKDSE Paper IB (1c)
Explain, from molecular level, why the
density of ice is lower than that of water.
understand and apply concepts & knowledge
� Formula of Water: H2O
� Shape of water (H2O) molecule: V shaped
� Force between water (H2O) molecule: “Hydrogen Bond”
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Do Chemistry Calculations
1. Relative atomic mass
There are two isotopes of chlorine and the
information about these two isotopes are
shown below.
Calculate the relative atomic mass of chlorine.
Isotopes Relative abundance35Cl 75%37Cl 25%
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Do Chemistry Calculations2. Mole Calculations Mole = mass/formula
massQuestion
Which of the following containing greatest number of mole of ions?
A. 58.5g Sodium chloride
B. 94g Potassium oxide
C. 132.5g Aluminium chloride
D. 109g Magnesium nitride
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Mole = mass / formula mass
Name Formula Mass(g) Formula Mass(sum of relative atomic mass)
Mole
Sodium chloride
NaCl 58.5 23+35.5 =58.5 1
Potassium oxide
K2O 94 39x2+16=94 1
Aluminium chloride
AlCl3 132.5 27+35.5x3=132.5 1
Magnesium nitride
Mg3N2 100.9 24.3x3+14x2=100.9 1
Greatest number of mole of ions ?
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Formula Cation & Anion Mole Mole of Cation
Mole of Anion
Mole of Ions(cation +anion)
NaCl Na+ Cl- 1 1 1 1+1=2
K2O 2K+ O2- 1 1x2 1 2+1=3
AlCl3 Al3+ 3Cl- 1 1 1x3 1+3=4
Mg3N2 3Mg2+ 2N3- 1 1x3 1x2 3+2=5
Do Chemistry CalculationsMole Ratio
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To certain extent, NSS Chemistry is
�interested in calculations
demanding !� Students with the following charactersare suitable to study NSS Chemistry:
� diligent (take initiative to work hard)
- to memorize quite a lot of facts
� Quiz & test are regular & frequent(weekly or biweekly)
- to understand abstract concepts
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The End