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Simon Dobbs's Shop

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I taught chemistry for 25 years. I now provide tuition online. I just like nicely produced, imaginative resources.

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I taught chemistry for 25 years. I now provide tuition online. I just like nicely produced, imaginative resources.
2,2,4-trimethylpentane- an interesting molecule.
simondobbssimondobbs

2,2,4-trimethylpentane- an interesting molecule.

(0)
2,2,4-trimethylpentane, or iso-octane used to feature heavily in the OCR Salters A level chemistry, because it is an important additive to petrol. It has slipped out of the specification, but the examiner must be sitting on many questions that might be recycled to test understanding. This is a simple information sheet that gives answers to a legacy question that one of my students was completing. It aims to answer difficulties with the question in a graphic way. The sheet runs to three pages and examines isomerism.
Cut & stick molecular shape
simondobbssimondobbs

Cut & stick molecular shape

(0)
Sixth formers love cut & stick. They reinforce understanding and promote discussion. Cut sheet and stick sheet, with spaces to write in bond angles, number of bonding pairs and number of lone pairs.
An atom anatomy
simondobbssimondobbs

An atom anatomy

(0)
I made a simple display of the atomic structure of various isotopes, with the emphasis on simplicity and clarity. Just because I wanted to. I also included it as keynote and powerpoint presentations.
alkenes versus arenes
simondobbssimondobbs

alkenes versus arenes

(0)
I made a simple three slide presentation concerning addition reaction of alkenes compared with the substitution reaction of arenes. This is an important exam question topic and is poorly understood by students. I enclose both keynote and powerpoint versions.
Arene artwork
simondobbssimondobbs

Arene artwork

(0)
I wanted some nice graphics concerning the benzene topic for my own use, so I made some vector artwork and thought they might be of some use to somebody. These are all pdf files, but if you want editable svg or eps files, contact me.