NZQA registered unit standard
Title
Perform titrations
Level
5
8439 version 5
Page 1 of 3
Credits
5
Purpose
People credited with this unit standard are able to: perform a
back titration; perform a multi-component titration; perform an
acid base non-aqueous titration; and perform a conductometric
titration.
Classification
Science > Chemistry
Available grade
Achieved
Entry information
Recommended skills
and knowledge
Unit 26341, Perform titrimetric analyses; and Unit 8448,
Demonstrate knowledge of acid-base pH measurement and
equilibria; or demonstrate equivalent knowledge and skills.
Explanatory notes
1
All work must be carried out in accordance with the quality management system,
documented protocol system or Standard Operating Procedures typically acceptable
in a commercial or research laboratory.
2
Health and Safety practices must conform to Australian/New Zealand Standard
AS/NZS 2243:2006 Set – Safety in Laboratories Parts 1, 2, 3, 7, and 10 available at
http://www.standards.co.nz and http://infostore.saiglobal.com/store.
3
Legislation applicable to this unit standard includes:
Health and Safety in Employment Act 1992;
Hazardous Substances and New Organisms Act 1996.
Outcomes and evidence requirements
Outcome 1
Perform a back titration.
Evidence requirements
1.1
Back titration method is selected and justified in terms of the analyte.
NZQA National Qualifications Services
SSB Code 130301
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
1.2
8439 version 5
Page 2 of 3
Titration is carried out and the composition of a known sample is determined to
within a relative accuracy of ±5%.
Outcome 2
Perform a multi-component titration.
Range
binary mixtures of acids or bases, Ca2+, Mg2+ (water hardness).
Evidence requirements
2.1
Titration is carried out and the components of a known binary mixture in
aqueous solution are determined to within a relative accuracy of ±5%.
Outcome 3
Perform an acid-base non-aqueous titration.
Evidence requirements
3.1
Non-aqueous solvent is selected and justified in terms of the analytes.
3.2
Titration is carried out and the concentration of a known solution in a nonaqueous solvent is determined to within a relative accuracy of ±5%.
Outcome 4
Perform a conductometric titration.
Range
one of – strong acid and strong base, strong acid and weak base, weak acid
and strong base, precipitation.
Evidence requirements
4.1
Titration is carried out and the concentration of a known sample is determined
within a relative accuracy of ±5%.
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
22 December 1996
31 December 2014
Revision
2
19 February 1998
31 December 2014
Review
3
23 November 1999
31 December 2014
Review
4
18 June 2010
N/A
Rollover
5
27 January 2015
N/A
NZQA National Qualifications Services
SSB Code 130301
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
8439 version 5
Page 3 of 3
Consent and Moderation Requirements (CMR) reference
0152
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