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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.
Effect of pH on amino acids
simondobbssimondobbs

Effect of pH on amino acids

(1)
I made a crazy interactive widget to illustrate the ionic forms of glycine. Just for fun really. Please note: in order to provide a rich interactive experience, my interactive resources are mini-web sites local to your computer. After unzipping, they comprise a folder containing the main .html file and another folder containing the graphic resources and my coding to make the resource work. Double click on the .html file and the resource will work. If, however , you move or delete any of the files from this hierarchy, the resource will not work.
GCSE polymers
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GCSE polymers

(0)
A very simple worksheet to aid the distinction of addition polymers from condensation polymers. Explanation on page 1, questions on page 2.
Predict the reaction.
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Predict the reaction.

(0)
A plant dye is used in a question about reactions of organic functional groups. It is pertinent to the study of phenols. (NB I had previously ommited the reaction of phenol rings with bromine, now tried to include this)
Balancing-ionic-half-equations
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Balancing-ionic-half-equations

(0)
Quick and short presentation on how to balance the manganate (vii) half equation, to save you time. I have now added the oxidation of ethanol by acidified potassium dichromate (VI) as another example.
Ionic or Covalent?
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Ionic or Covalent?

(0)
A simple , readily photocopiable worksheet on this important skill: deciding on the bonding in a substance.
The Mole
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The Mole

(0)
A readily photocopied (B&W) worksheet on calculating numbers of moles. The first page is introductory, with some examples, the second page has ten questions of introductory difficulty.
Cut & Stick reaction mechanisms
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Cut & Stick reaction mechanisms

5 Resources
Sixth formers love cut & stick exercises. They are valuable because they familiarise the student with the mechanism, they promote discussion when done in groups, and are different to taking notes and practical work.
Naming Organic Substances 2
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Naming Organic Substances 2

(0)
Second in a series. This worksheet covers different functional groups. Information on the front, 6 questions on the back. In black and white for ease of photocopying. With answers.
Functional Groups
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Functional Groups

(0)
A very simple presentation listing major functional groups. Could be printed out and used as a display.
Identify functional groups in coloured dyes
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Identify functional groups in coloured dyes

(0)
This sheet is intended to provide practice in identifying and naming functional groups in organic substances. This is an important skill that repeatedly comes up in exam papers. As a theme, natural dyestuffs found in plants are used. There are five examples over two pages.
Neutralisation Reactions
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Neutralisation Reactions

(0)
This is a simple worksheet about writing word equations for neutralisation reactions. It covers 2 pages. There are plenty of examples, which get harder as you go on. There is an accompanying powerpoint, as an additional download… NB I am well aware that exam boards, RSC and text books regard acid plus metal to be a redox reaction, which of course it is. However, in such a reaction, the pH increases to neutral and the acid has gone, so I think it can properly be regarded as neutralization of an acid. And since this worksheet is really about naming salts, I had to include it.
Neutralisation Reactions presentation
simondobbssimondobbs

Neutralisation Reactions presentation

(0)
This is a simple powerpoint presentation outlining how to write word equations for neutralisation reactions. It has plenty of examples and problems. It is allied to my worksheet of the same name, with the same problems for students to try. The answers are at the end of the presentation, for students to mark their own work.
Rate of reaction with a gas syringe simulation.
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Rate of reaction with a gas syringe simulation.

(0)
I have made a simulation of the marble chips and acid experiment at four different concentrations of acid. Just double click on the “gas syringe.html” file and it will open in your web browser. You could use browser zoom controls to make it huge if you wish. Maybe take measurements of volume of gas evolved against time or just use to introduce the experiment or revise. ( the price for this could save your department many times in broken gas syringes.) Please note: in order to provide a rich interactive experience, my resources are mini-web sites local to your computer. After unzipping, they comprise a folder containing the main .html file and another folder containing the graphic resources and my coding to make the resource work. Double click on the .html file and the resource will work. If, however , you move or delete any of the files from this hierarchy, the resource will not work.
Nucleophilic substitution mechanism cut'n'stick.
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Nucleophilic substitution mechanism cut'n'stick.

(0)
A cut and stick exercise to help reinforce this very important concept. Students cut out the pieces and arrange the pieces to give the correct mechanism. Prepares students for those five mark questions where they often lose marks. Other mechanisms to come plus drag and drop versions, so watch this space…
Ions
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Ions

(0)
This is a simple powerpoint giving names and formulae of ions. Knowledge of these can provide a key to understanding chemistry at GCSE and A level. Print these off, laminate them, and display in a prominent position in a lab. (NB I have corrected the ammonium ion error)
Hazard warning signs drag & drop-interactive lab safety
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Hazard warning signs drag & drop-interactive lab safety

(0)
Match the hazard warning sign to its description. If correct it sticks. Open the html file by double clicking, et voila. A preview of this activity can be seen on my web site. Please note: in order to provide a rich interactive experience, my drag & drop resources are mini-web sites local to your computer. After unzipping, they comprise a folder containing the main .html file and another folder containing the graphic resources and my coding to make the resource work. Double click on the .html file and the resource will work. If, however , you move or delete any of the files from this hierarchy, the resource will not work.
Rate of reaction simulations
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Rate of reaction simulations

3 Resources
Disappearing cross plus gas syringe simulations. Please note: in order to provide a rich interactive experience, my interactive resources are mini-web sites local to your computer. After unzipping, they comprise a folder containing the main .html file and another folder containing the graphic resources and my coding to make the resource work. Double click on the .html file and the resource will work. If, however , you move or delete any of the files from this hierarchy, the resource will not work. ©D&D production
Pretty poly(mers) drag&drop
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Pretty poly(mers) drag&drop

(0)
Double click on pretty poly(mers).html, and the activity will open in you browser. Simply drag the structure of each monomer to the box next to the name of the polymer. Good AFL around the whiteboard. A paper version is also available. Suitable for GCSE and A level students. Please note: in order to provide a rich interactive experience, my interactive resources are mini-web sites local to your computer. After unzipping, they comprise a folder containing the main .html file and another folder containing the graphic resources and my coding to make the resource work. Double click on the .html file and the resource will work. If, however , you move or delete any of the files from this hierarchy, the resource will not work.