Which one is it? – intermolecular forces

November 16, 2015

Here is a question that should get you thinking … I have two molecules, chloromethane (CH3Cl) and iodomethane (CH3I). What types of intermolecular forces are found in these molecules. Well, hopefully you are OK with that – it is London dispersion forces and permanent...

Topic 6.1 Investigation of rates of reaction experimentally and evaluation of the results

November 11, 2015

This blog post follows on from previous ones. Since July 2015, each month I have been working through the list of mandatory labs from the Chemistry IA course. As discussed previously, the idea behind these labs is great – each student, teacher and school will be...

The Mandatory Labs / Skills: Topic 5.1, A Calorimetry Experiment for an Enthalpy of Reaction

October 19, 2015

Over the last couple of months I have posted some ideas of lab work for you to help with the mandatory labs or mandatory skills that the IB has stipulated are carried out over the duration of the IB course. So far we have looked at labs for deducing the empirical...

Mandatory Lab Ideas, 1.3, determining the molar mass of a gas by using the ideal gas equation.

September 18, 2015

These posts are developing into a bit of a theme. So far, in July we looked at mandatory lab 1.2, ‘the obtaining and use of experimental data for deriving empirical formulas from reactions involving mass changes’, while last month is was 1.3, ‘use of the experimental...

Mandatory Lab Ideas, Topic 1.3, Titrations

August 5, 2015

Last month’s post focused on the mandatory lab covered in section 1.2, ‘The obtaining and use of experimental data for deriving empirical formulas from reactions involving mass changes’. This month, I thought I would carry on with this theme and focus on the...

Mandatory Lab Ideas, 1.2, Empirical Formula

August 3, 2015

As you well know, the IB now tells us that we must carry out up to twelve mandatory labs or skills (I say up to as there is some debate whether 9.1, the application of the Winkler method is mandatory or not and the ‘single replacement labs’ occur twice, in 15.1 and...