Template for Selwyn College Assessment and Moderation Scheme
Course: Level 2 Chemistry
Level: NCEA Level 2
HOD/TIC Lynn Sommers
Date: 2014
Forms of Assessment
In order of teaching
Achievement Objectives
and Specific Learning Outcomes
Internal Assessment
This achievement standard involves demonstrating understanding of oxidation-reduction.This activity
AS91167
2.7
Demonstrate
understanding of
oxidation reduction
requires students to complete a practical and written report on redox reactions.
AS 91164 2.4
DEMONSTRATE
UNDERSTANDING OF
BONDING AND
STRUCTURE
EXTERNAL 5 CREDITS
Page 1 of 2
1
Oxidation-reduction is limited to:

oxidation numbers

electron transfer in reactions

oxidants and/or reductants

observations for reactions

balanced oxidation-reduction half equations

overall balanced oxidation-reduction equations.
2
Knowledge of the appearance of redox reactants and their products includes a selection from, but is not
limited to:

oxidants include a selection from, but not limited to: O2, I2, Br2, Cl2, OCl- H+,Fe3+, Cu2+, H2O2, MnO4–/H+,
Cr2O72–/H+, concentrated HNO3, IO3
reductants include a selection from, but not limited to, metals, C, H2, Fe2+, Br–, I–, H2S, SO2 ,SO32–,
HSO3–, H2O2
Timing and
Duration
2
continuous
hours, in
class.
Term 1,
week 5
Conditions
Students will work
individually to carry out all
aspects of the investigation.
The entire assessment will
take place in the laboratory.
This achievement standard involves demonstrating understanding of bonding, structure, properties and
energy changes.
1
Bonding, structure and energy changes are limited to:






2
ionic, covalent and metallic bonding
intermolecular forces (the distinction between the different types of intermolecular forces is not required)
Lewis structures, shape and polarity of simple molecules. Simple molecules have no more than four electron pairs about any
atom (including multiple-bonded species)
molecular, ionic, metallic and covalent network substances
exothermic and endothermic reactions including energy (enthalpy) changes associated with differing amounts of substances and
changes of state and enthalpy changes associated with the making and breaking of chemical bonds
calculations of energy changes using ΔrH and reaction stoichiometry, and bond enthalpy.
Properties are limited to hardness, ma uctivity, melting and boiling points and solubility.malleability, ductility, electrical
conductivity
1 hour,
assessment
Term 1,
week 12
Test conditions, in class
assessment.
AS91161 2.1
Carry out
Quantitative
Analysis
Internal 4 credits
This standard involves a practical paper and a theory paper. Titration practical and mole calculations.
Quantitative analysis involves collecting primary data from an acid-base titration, and processing both primary and
secondary data to solve quantitative problems.

The standard solution to be used in the titration may be provided. The titration procedure and balanced equations will
be provided.

Student selected data will be used in determining the accuracy of the titration.
Carry out quantitative analysis involves:

collecting titration data that contains at least three titre values that fall within a range of 0.4 mL; the average titre value
must be within 0.8 mL of the expected outcome

solving quantitative problems that use the relationships n=m/M and c=n/V to calculate one variable given the other
two (the relationships are not given). Molar masses for substances may be provided. Calculations must be carried
out using appropriate procedures (not provided).
Test conditions, in class
assessment
2 ,1 hour,
assessments
Term 2,
week 7
Carry out in-depth quantitative analysis involves:

collecting titration data that contains at least three titre values that fall within a range of 0.4 mL; the average titre value
must be within 0.5 mL of the expected outcome

solving quantitative problems that involve at least two steps and require application of relationships such as n=m/M
and c=n/V. Titration calculations must be carried out correctly using only concordant titre values.
Carry out comprehensive quantitative analysis involves:

collecting titration data that contains at least three titre values that fall within a range of 0.2 mL; the average titre value
must be within 0.2 mL of the expected outcome

solving quantitative problems that involve more than two steps, and the use of stoichiometric principles. Answers to
calculations must demonstrate correct units and appropriate use of significant figures.
AS91166
2.6
Demonstrate
understanding of
chemical reactivity
External 5 credits
This achievement standard involves demonstrating understanding of chemical reactivity ( rates, acids/bases, equilibrium)
Chemical reactivity is limited to rates of reaction and equilibrium principles.
1
Rates of reaction involve:

factors affecting rates of reaction – restricted to changes in concentration, temperature, surface area, and the
presence of a catalyst

using collision theory to explain the factors (includes activation energy).
2
Equilibrium principles are limited to:






the dynamic nature of equilibrium
the effect of changes in temperature, concentration, pressure, or addition of a catalyst on equilibrium systems
the significance of the equilibrium constant (Kc) for homogeneous systems. This may involve calculations
the nature of acids and bases in terms of proton transfer
properties of aqueous solutions of strong and weak acids and bases including ionic species. The properties are restricted to
conductivity, rate of reaction, and pH
calculations involving Kw and pH (restricted to strong acids and bases).
1 hour,
practice
assessment
Term 3,
week 5
Test conditions, in class
assessment
Further assessment mid year
exams/end of year
AS 91165 2.5
DEMONSTRATE
UNDERSTANDING OF
ORGANIC
COMPOUNDS
EXTERNAL 4 CREDITS
This achievement standard involves demonstrating understanding of the properties of selected organic
compounds.
Selected organic compounds are limited to: alkanes, alkenes, alkynes, haloalkanes, primary amines, alcohols, and carboxylic acids.
Properties are limited to:




1
constitutional and geometric (cis and trans) isomers
classification of alcohols and haloalkanes as primary, secondary or tertiary
solubility, melting and boiling points
chemical reactions.
Chemical reactions are limited to:






addition reactions of alkenes with H2/Pt, Cl2, Br2, H2O/H+ (conc. H2SO4/H2O) and hydrogen halides (including identification of
major and minor products on addition to asymmetric alkenes), polymerisation
substitution reactions of:
- alkanes with halogens (limited to monosubstitution)
- alcohols with hydrogen halides, PCl3, PCl5, SOCl2
- haloalkanes with ammonia and aqueous potassium hydroxide
oxidation of:
- primary alcohols to form carboxylic acids with MnO4-/H+ or Cr2O72-/H+
- alkenes with MnO4–
elimination of (including identification of major and minor products for asymmetric reactants):
- water from alcohols
- hydrogen halides from haloalkanes
acid–base reactions of carboxylic acids and amines.
Template for Selwyn College Assessment and Moderation Scheme
Course: Level 2 chem
1 hour,
practice
assessment
Term 3,
week 10
Year Level: NCEA Level 2
HOD/TIC: lynn sommers
Date: 2014
Page 2 of 2
Test conditions, in class
assessment
End of year exams
Procedures to Ensure the Authenticity of
Student Evidence
Process for the Pre and Post Moderation
of Assessment Judgements
Process for the Recording and Storing of
Assessment Judgements
Further Assessment Opportunity
(maximum of one only)
All assessments, both internal and
practice are done in class, individually.
And in full view of the assessor.
The Internal Assessments moderated in
best practice workshops and the same
assessment has been subjected to NZQA
external moderation, repeatedly.
Check marking will be done by the other
Chem teacher.
All grades are to be recorded in the
teacher’s workbook and in the PCschool
markbook.
All student internal assessment papers
are to be stored in the science office filing
cabinet, in S5.
Any queries or appeals will be referred to
the HOD of chem initially. If there is no
resolution at that point, then the school
policy for appeals will be followed.
There will be a single reassessment
opportunity for the internal assessment,
the week after the original assessment.