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AS3.6 Aqueous Chemistry (External)
This externally assessed standard is worth 5 credits and is essential for your future understanding at a tertiary level.
You will cover a large amount of content and the teaching  component will take approximately 10 weeks of class time.

The following is a comprehensive list of all the key areas that you must cover for AS3.6. This topic will introduce a lot of new terminology and concepts, so listen well and ask plenty of questions.

what you need to know!

Equilibrium principles in aqueous systems are limited to qualitative descriptions and/or calculations involving:

  • relative concentrations of dissolved species
  • sparingly soluble ionic solids
    • relating solubility to Ks
    • solubility of solids in water and in solutions already containing one of the ions A or B (a common ion) or due to the formation of a complex ion, or the reaction of a basic anion with added acid
    • predicting precipitation or dissolution
  • acidic and basic solutions (includes buffers)
    • acid/base strength, Ka (pKa)
    • concentration of species present in weak acidic and/or basic solutions (includes buffers)
    • relating concentration of species to pH and conductivity
    • titration curves to represent an acid-base system including selection of indicators (titrations of weak acids with weak bases are excluded). 

Sparingly soluble ionic solids are limited to AB, A2B and AB2 types where neither of the ions A nor B reacts further with water. 

Acidic and basic solutions are monoprotic acids, bases, salts, and buffers (those in which the extent of reaction is small so that the equilibrium concentration of a dissolved weak acid or base can be approximated by the initial concentration).

resources

AS3.6.pdf
click to download
pH at equivalance.pdf
click to download
Year 13 Chemistry - Acids.doc
click to download
Year 13 Chemistry - Bases.doc
click to download
Year 13 Chemistry - Indicators.doc
click to download
Year 13 Chemistry - Buffer solutions.doc
click to download
Year 13 Chemistry - Equilibrium.doc
click to download
Year 13 Chemistry - Solubility Constants.doc
click to download
Year 13 Chemistry - Titrations and pH curves.doc
click to download
solubility calculations practice answers.pdf
click to download

worksheets

worksheet-aqueous-1.doc
Precipitation 1
worksheet-aqueous-2.doc
Precipitation 2
worksheet-aqueous-3.doc
Acids and Bases
worksheet-aqueous-4.doc
Ka Kb Kw
worksheet-aqueous-5.doc
Species in Solution
worksheet-aqueous-6.doc
Buffers
worksheet-aqueous-7.doc
Titrations

practice papers

3.7.doc
NZIC 2011 Old Standard
Chem 3.7 Questions 11.doc
Old Standard
Chem 3.6 Questions 12.doc
click to download
Chem 3.6 Questions 13.docx
click to download
Chem 3.6 Questions 14.docx
click to download
Chem 3.6 Questions 15.docx
click to download
Chem 3.6 Questions A.doc
click to download

answers for worksheets

worksheet-aqueous-1-answer.doc
Precipitation 1
worksheet-aqueous-2-answer.doc
Precipitation 2
worksheet-aqueous-3-answer.doc
Acids and Bases
worksheet-aqueous-4-answer.doc
Ka Kb Kw
worksheet-aqueous-5-answer.doc
Species in Solution
worksheet-aqueous-6-answer.doc
Buffers
worksheet-aqueous-7-answer.doc
Titrations

answers for papers

3.7 AS.doc
NZIC 2011 Old Standard
Chem 3.7 Assess sched 11.doc
Old Standard
Chem 3.6 Assess sched 12.doc
click to download
Chem 3.6 Assess sched 13.docx
click to download
Chem 3.6 Assess Sched 14.docx
click to download
Chem 3.6 Assess Sched 15.docx
click to download
Chem 3.6 Assess sched A.doc
click to download

videos

Neutralisation Reactions
Acid Base Equilibrium
Equilibrium II
pH at the Equivalence Point
Equilibrium
pH and Buffers
Weak Acid Titration
Equilibrium Constant
Solubility I
Half Equivalence Point
Le Chateliers Principle
Solubility II
Titration Roundup