Special studies
You can find updated texts and experiments, study guides, web-links, and sample exam questions for Biochemistry, Materials Science, Chemical Engineering and Food Science. The new versions are easier to study while still covering everything needed for the Edexcel/Nuffield course. For Mineral Process Chemistry see the React tutorials and instructions about where to get the books.
In the Special Studies the experiments are not an optional extra but an integral part of the course.
Although the Edexcel Chemistry (Nuffield) specification does not expect you to be able to recall all the details of how to carry out the experiments, an exam question could describe the experiment to you, and then ask for an understanding of why it was conducted in the manner described or to give an outline of the results expected. The best way to prepare for this is to do the experiments!
Recently Asked Questions
- I am doing an investigation to determine the concentration of iron in cereal. I liked the method on your website for extraction of iron using phosphoric acid but I am unable to determine what volume and number of moles of it to use. I have also seen method of burning the cereal to an ash then adding HCl. I want to end up with Fe2+ ions as I plan to titrate with KMnO4. Which method do you think would work best? If it is the one using phosphoric acid could you advise me on what volume and number of moles of it to use?
- For my 6th year project I am investigating factors affecting vitamin C concentration in fruit juice. I am using the DCPIP titration method. Before I use fruit juices I know that I have to standardise the DCPIP. My problem is the colour change when I am titrating the DCPIP into the known ascorbic acid solution. The change in colour from colourless to faint pink is too vague and gradual to put an end-point to it and hence a volume of DCPIP used. My teacher suggested adding hydrochloric acid to the ascorbic acid in the conical flask but this still isn't working. Do you know what the problem might be? Or is there a way to give me a sharp colour change? 181209
- I've done an experiment to find out which cooking method can reserve more Vitamin C in broccoli, using DCPIP. I've used boiling, baking and stir-frying in the test and I've successfully found out which is the best. However, when I used raw broccoli to do the control experiment, I found that raw broccoli shows negative result in the DCPIP test, which is really shocking. I've repeated the control experiment by extracting the juice with first, the mortar, and then the blender, but the raw broccoli still shows no sign of Vitamin C. Why? 170709
updated: 18 December 2007
