Adrian Dingle’s Chemistry Pages

Chemistry Educator, Tutor, Writer and Author


A true “chemistry freelancer” and Subject Matter Expert (SME), Adrian brings thirty-one years of full-time classroom chemistry teaching experience, and tens of thousands of hours of one-on-one chemistry tutoring across the globe, to a sixteen year writing career that includes several best-selling, international award-winning chemistry books and a burgeoning portfolio of other chemistry writing projects. You’ll find Adrian’s deep expertise applied wherever the need for an explanation of chemistry exists, and where a void in communicating chemistry to children or students is found

of tutees helped

years as a chemistry educator


children's book awards
Many students find their chemistry classes challenging ones. Reasons include the intellectual demands of the subject, difficulties with the mathematical aspects of chemistry, and problems associated with the instruction that they are receiving at school or college. As a result, many students will fail to reach their full potential. 1-on-1 chemistry tutoring with an experienced teacher will help them to reach that potential
“We would like to thank you for helping our son develop proficiency in AP Chemistry, and especially in developing critical thinking skills in this subject. For a sophomore student he has come a long way in understanding complex areas of the subject, and your teaching helped him substantially.”
'R' in New Jersey, USA

“I got a 5 on AP chemistry and a 770 on the subject test. Thank you so much for all your help this year. I couldn’t have done it without you.”

Vivian in Connecticut, USA

The best-selling review book that cuts straight to the chase, and delivers higher scores on the AP chemistry exam, is now available in its 3rd Edition

Updated for the 2020 exam forward, the 3rd Edition of the Crash Course book references the AP Chemistry 9 UNIT organization, and deals with each of the minor changes that were introduced for first examination in 2020

“Not only was this book an awesome resource to use for the AP exam, I have continued to use it as a reference in college. The material is so well organized and so thorough, despite being such a short book. The online review was an awesome bonus and I used it to prepare for the AP exam”


“Dear Adrian, Today is my birthday. My eighteenth birthday. This feels like a good excuse to write to you – I’ve been meaning to write for a couple years, to thank you for your writing. Eight years ago, aged 10, after forgetting to pack my miniature painting set when I went on holiday, my mum bought me a book to cheer me up. I read your book ‘How to Make a Universe with 92 Ingredients’ at least three times that fortnight, cover-to-cover, and I was hooked by the chemistry, fascinated by the unseen world that I could explore. Inspired by your book, I would steal my brother’s textbooks to read at night, set up the family camera to film my own chemistry videos, and – most importantly – I started experimenting at home. I took my Chemistry GCSE (I live in the UK) aged twelve, four years early. I was the youngest student in the country to get a GCSE A* in 2014 in any subject. Now 18, I’m taking the International Baccalaureate, studying Maths, Chemistry and Physics at higher level. I’m applying to study Natural Sciences (Physical) at Cambridge University.” – Tom

November 2019


… on Acid-Base

Deadly gas is common AP Chemistry analog

Ammonia is a pretty ubiquitous chemical substance when it comes to AP Chemistry. Not so much much in terms of actually encountering it in the lab,...

All creatures great and small and 2016, 6

All things bright & beautiful, all creatures great and small. Remember that hymn? We often talk about remembering the little things, well here's...

Math, Buffers and H-H (part 2)

Following this post, I wanted to follow up with another quick note on the math of buffers as it relates to the new (when will I stop calling it...

Math, buffers and H-H, revisited in the new curriculum

I think that there are (unfortunately) some useful, simple math things to know when it comes to buffers and H-H in the new AP chemistry curriculum....

AP Worksheet 14x – missing answers

Click below for the answers to the questions from AP Worksheet 14x that we did not do in class. 1987, 1 1992, 6 2001, 3 2004B, 5 2005B, 1 2006B,...

Subscriber Updates

The following materials have been updated in the relevant subscriber areas; AP notes TOPIC 6, AP Worksheet 14s answers and AP Worksheet 16s answers

… on the 2019 CED

Quadratics, equilibrium, and AP Chemistry

Here's a common question that I was asked once again today; Adrian, why do some of your materials point to equilibrium problems that contain the...


That sounds like a Chicago song, but ... ... in various places on this site, you will see references in the AP sections to "17 TOPICS", "6 UNITS"...

Updated CED (May 2019) – Emerging thoughts

So here we are with an updated CED. My experience of formally working with the College Board was painful, and was made more difficult at every turn...

… on all topics

Tom Greenbowe’s Flash REDOX titration simulation lives!

At least for now. You may know that one of my favorite simulations of all time is an ancient one produced by Tom Greenbowe. It's a favorite of mine...

The 10 blog posts ALL #apchemistry students should read

Here's a round up of some of the most popular blog posts that I've written relating to AP Chemistry. Some of these are old posts, some relatively...

AP Chemistry exam integrity goes into negative territory for 2021

Let's not bury the lead here. If you thought the AP Chemistry exam in 2020 was a zero integrity farce (spoiler alert, it was), it's going to be...

Quadratics, equilibrium, and AP Chemistry

Here's a common question that I was asked once again today; Adrian, why do some of your materials point to equilibrium problems that contain the...

Error in AP Chemistry ‘Exam’ 2020 confirmed

A couple of weeks ago I wrote to Jamie Benigna (Director AP Chemistry Curriculum, Instruction, and Assessment) to ask about an error that I spotted...

The real lesson for vulnerable teens

If you're an impressionable, highly-strung, high achieving 15 to 18 year old, this AP 'exam' season has been stressful. I get it, I really do. I've...


That sounds like a Chicago song, but ... ... in various places on this site, you will see references in the AP sections to "17 TOPICS", "6 UNITS"...

So you’ve taken the AP Chem ‘Exam’ in ’20. What will your score be?

Of course, the question above assumes that you managed to upload files today, and/or that your re-take will go smoothly ... but ... ignoring that...

Further reasons to not take the AP chemistry ‘exam’ in 2020 as a HS senior

If you are a high school senior preparing to take the AP Chemistry 'exam' in 2020, you may want to think again. There are already a whole host of...

My position on the 2020 AP Chem ‘exam’

A lot has happened since the College Board first announced that the 2020 AP Chemistry ’exam’ would be going ahead in a vastly modified format. At...