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Regular Users
If you are a regular user of this website, and any of the Resources that I have personally produced, you may like to make a small donation.
2024 CED Update
My Notes gave been updated to reflect the recent CED Update.
Plans to refresh my Notes have been put on back burner.
Right click on the 'At A Glance' image to download a high resolution (11872 x 4638 pixels) version.
2024 CED At A Glance
AP Chem Unit 3 - Properties of Substances & Mixtures
AP Chemistry Notes by Gordon Watson are licensed under Attribution-NonCommercial-ShareAlike 4.0 International
Unit 3 Overview
Lesson Notes
Lesson Note Downloads
* Updated to reflect CED changes for 2024/25
Unit 3 Complete Student Notes*
Unit 3 Student Notes With No Questions*
Unit 3 MC & FRQ Questions
🔐 Access to the Answers to AP Questions is restricted to verified AP Chemistry Teachers
Solutions to Problems
Another teacher has made videos showing worked solutions to the Questions in these Notes.
She is happy to share them with everyone through her YouTube Channel.
YouTube Playlist
Using Whiteboard
Over the years I've used a variety of whiteboards to go through Notes with classes - both in person and online.
I prefer creating my teaching resources in more sophisticated packages, such as Adobe InDesign and then save to pdf before importing into my whiteboard.
I need to be able to easily import multiple pages of a pdf file. Openboard ✅
I then need to be able to hide some of my text/diagrams with a white pen. Openboard ✅
I then need to be able to erase to reveal text/diagrams. Openboard ✅
I can't afford to buy! Openboard ✅
Download OpenBoard Lessons
These WhiteBoard lessons will already have the relevant text blanked out with white pencil but ......
.... the default setting will be white background/black pencil ...
.... so make sure to change to black background/white pencil
Having lost access to YouTube, I'm in the process of investigating other options. This page uses Bunny
.
Lesson 1 - Intermolecular Forces
Lesson 2 - Properties of Solids
Lesson 3 - Solids, Liquids & Gases
Lesson 4 - Ideal Gas Law
Lesson 5 - Kinetic Molecular Theory
Lesson 6 - Deviation from Ideal Gas Law
Lesson 7 - Solutions & Mixtures
Lesson 8 & 10 - Representations of Solutions & Solubility
Lesson 9 - Separation of Solutions & Mixtures - Chromatography
Lesson 11 - Spectroscopy & Electromagnetic Spectrum
Lesson 12 - Photoelectric Effect
Lesson 13 - Beer-Lambert Law
Under Construction
Whilst I cannot provide access to the Answers in my Notes (to anyone other than a registered AP Chemistry teacher), I now have 2 iOS/macOS Apps that can be used to generate MCQ Quizzes with Answers, Hints & Explanations.
They are different from the questions in my Notes but equally valid.
APChem Quiz&Cards iOS
APChem PDFMaker iOS
APChem PDFMaker macOS
APChem QuizMaker & PDF Exporter - June 2025 - iOS & macOS
You need to access the Apple Store from a Laptop/Desktop to install the macOS version.
This App is mainly aimed at Teachers ...... but many Students would also benefit from the ability to tailor their own Quizzes to aid Review.
A Free Trial version is available on Apple Store - fully functional except for the final pdf Export button.
I would recommend the desktop/laptop version as it has extra features as well as the ability to do everything on a single screen.
A single subscription gives access to all iOS and macOS versions.
APChem Quiz & Cards - Jan 2022 - iOS only
This App is mainly aimed at Students ...... but many Teachers would also benefit from the ability to quickly check & refresh their understanding of the AP Chemistry course.
There is no Trial version available on Apple Store but there are various preview here and on the dedicated App Page.
A single one-off payment gives access to the present and future versions.
Some App Samplers
I've now got quite a neat way of letting people sample some of the Flip Cards and MCQ that I have in my App.
Here are 72 of the over 300 Flip Cards that are in the App. I use them in a variety of ways to basically cover the things that you cannot do in a MCQ.
There are also 92 of the over 900 MCQ that I have in the App.
Both the Flip Cards and the Quiz Cards can be loaded by Unit or all together - there are almost unlimited options available in the App.
Obviously the MCQ do not operate as flip cards in the App - this is purely to illustrate the range of styles used so the back of each card is showing what happens if you press and hold on the "Reveal Answer" Button.
In normal usage there are the 4 option Buttons as well as "Hints" and "Explanations" that would hopefully be used as well.
These images are screenshots and have also been processed to reduce their size (for speedier downloading).
Everything is a lot crisper when viewed directly on a device and images can be enlarged where necessary.