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# Big Idea 6

## Water in equilibrium mixtures and Le Châtelier’s principle

When it comes to water in equilibrium mixtures and Le Châtelier's principle, things can be confusing, so let's try to take some of the mystery out...

## ∆G and ∆G° revisited

∆G and ∆G° can be tricky things. This is partly evidenced by a post that I wrote back in January of 2012 continuing to be one of the most popular of...

## More, potentially useless Wordles

I recently re-visited the Wordles that I first produced in June of 2013 for the original versions of my AP Chemistry notes for Big Ideas 1-6. You...

## pH and significant figures

In a quick addition to this post and this post, here's a note about pH and significant figures. Firstly the 'rule'. When taking the log of a number...

## log, ln, units and activities

Honestly, I don't pretend to be a good math(s) student - in fact quite the opposite is true - so me trying to explain the niceties of transcendental...

## ‘Thermal Energy’ = 2.4 kJ/mol in EK6D1b.??

This post poses a question that I don't know the answer to. I have asked this particular problem on the College Board's AP Chemistry electronic...

## 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....

## ‘Expanded LCP’ or ‘Q versus K’ explanations?

It's never been OK, on the AP exam, to offer a simple, 'because of Le Châtelier’s principle' argument as the explanation for the shift of an...

## Inert gases and gaseous equilibrium mixtures

What happens when an inert gas is added to a gaseous equilibrium mixture at constant volume? Before we answer that question, it might be worth...

#### ORGANIC COURSE 2

Read about Adrian as an Educator of over thirty years, as a Chemistry Tutor with a resume of helping hundreds of private clients over three decades, and as an Author and Writer with an extensive portfolio of work

Read about the the four Core Values that drive all of Adrian's professional endeavors, and that act as the cornerstones of his work