NZQA registered unit standard
6345 version 5
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Title
Analyse oxidation - reduction reactions
Level
3
Credits
4
Purpose
People credited with this unit standard are able to determine
the concentration of an oxidant or reductant by titration, and
balance oxidation-reduction reactions.
Classification
Science > Chemistry
Available grade
Achieved
Explanatory notes
1
The International Union of Pure and Applied Chemistry (IUPAC) conventions for
electrochemical cells must be used.
2
Concentrations can be expressed as either mol L-1 or g L-1.
Outcomes and evidence requirements
Outcome 1
Determine the concentration of an oxidant or reductant by titration.
Range
any one oxidant of - I2, MnO4-, IO3-, Cu2+, OCl-;
with any one reductant of - Fe2+, SO32-, C2O42-, S2O32-.
Evidence requirements
1.1
Oxidation-reduction titrations are carried out in accordance with the given
procedures.
1.2
Concentrations of oxidant or reductant are calculated from titre values.
Outcome 2
Balance oxidation-reduction reactions.
NZQA National Qualifications Services
SSB Code 130301
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
6345 version 5
Page 2 of 2
Evidence requirements
2.1
Written oxidation-reduction equations are balanced for given reactants.
oxidants may include - O2, Cl2, H2O2, I2, Fe3+, MnO2, OCl-,
MnO4-, IO3- , Cu2+, Cr2O72-/H+;
reductants may include - Zn, Mg, Fe, H2, SO2, H2S, Fe2+, SO32-,
C2O42-, S2O32-, I-;
evidence of three oxidation-reduction equations is required.
Range
Planned review date
31 December 2017
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
21 December 1995
31 December 2013
Review
2
31 October 1996
31 December 2013
Revision
3
7 July 1999
31 December 2013
Revision
4
12 February 2003
31 December 2013
Review
5
20 September 2012
N/A
Consent and Moderation Requirements (CMR) reference
0226
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR also includes useful information about special requirements for organisations wishing
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
Comments on this unit standard
Please contact NZQA National Qualifications Services nqs@nzqa.govt.nz if you wish to
suggest changes to the content of this unit standard.
NZQA National Qualifications Services
SSB Code 130301
 New Zealand Qualifications Authority 2016