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NCEA Level 3 Chemistry
Equilibrium principles in aqueous systems
New outlines and revision notes for the revised Level 3 standards were prepared in 2013. However the three new externally assessed AS are not that different from the expired ones and most of the resources are still fine to use!
Overview
Last minute reminders / At a glance sheets
One A3 page summary - new in 2023
Last minute Aqueous Chemistry reminders
Some things just come up more often than others - past question audit Updated to include 2021 exam
NB2S Practice Examinations
NB2S AS 91392 Practice Exam paper #1 Answers HERE (Not as AME)
NB2S AS 91392 Practice Exam paper #2 Answers HERE (Not as AME)
NB2S AS 91392 Practice Exam paper #3 Answers HERE (Not as AME)
Solubility and Ks and predicting precipitation
Solubility - essential equations
AS91392 Solubility & Complex ions - new for 2020
AS91392 Collated solubility and solubility product questions 2008 - 2018 (minus parts predicting precipitation, common ion and complexes - see below for 2019-2024 for full questions)
Species in solution
AS 91392 Help sheet for species in aqueous solutions
pH - weak acids, bases and salts
pH is pHun! All the equations for pH calculations
Flashcards (for all calculations involving pH)
AS91392 Collated pH calculations (and misc including some species in solution) from 2017-2024- with answers 
Buffers, titration curves and indicators
AS91392 Collated buffer questions (2011-2024) - with answers
AS91392 Collated Titration and Titration Curve questions (2013-2024) - For some earlier answers please email us
Sketching pH curves (Still useful for AS 91392)
How to calculate pH of basic buffers using Ka expression
Flashcards for whole AS
Misc
AS91392 Which arrow should I use? (and more)
Useful equation sheet (see page 1 for this AS)
Collated NCEA questions 2005-2010 - still valid for AS91392 (not organised by subtopic and definitely no longer being updated)
Last Amended...
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