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GCSE CHEMISTRY - The Best Free Revision for GCSE Science.

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Aqa rm 2013 GCSE Science. GCSE Science From Wikibooks, open books for an open world Jump to: navigation, search Welcome to the world's foremostGCSE Science Textbook on the web! This General Science book is aimed at GCSE students rather than university students. Contents by Topic Introduction Biology Chemistry Physics Contents by Modules The GCSE exam can be modular or combined. Modules usually studied in year 10 Edexcel Modules usually studied in year 11 Coursework Common coursework experiments Retrieved from " Subjects: Hidden categories: Navigation menu Personal tools Namespaces Variants Views Actions Navigation Community Tools Languages Sister projects Print/export This page was last modified on 2 September 2010, at 13:57.


Gcse definitions Atom element molecule compounds pure impure mixture, meaning definitions physical change, evidence of chemical change explained explaining KS3 science KS4 science GCSE IGCSE O Level chemistry revision notes. Section 1.4 CHEMICAL CHANGES - REACTIONS - reactants and products Heating iron and sulphur is classic chemistry experiment to illustrate what is meant by CHEMICAL CHANGE and you can adapt the general conclusions described at the end of this section to any chemical reaction. A mixture of silvery grey iron filings and yellow sulphur powder is made. The iron can be plucked out with a magnet i.e. an easily achieved physical separation because the iron and sulphur are not chemically combined yet! They are still the same iron and sulphur. However, on heating the mixture, it eventually glows red on its own and a dark grey solid called iron sulphide is formed.

Both observations indicate a chemical change is happening i.e. a new substance is being formed. We no longer have iron or sulphur BUT a new compound with different physical properties (e.g. colour) and chemical properties (unlike iron which forms hydrogen with acids, iron sulphide forms toxic nasty smelling hydrogen sulphide!). IGCSE/GCSE CHEMISTRY study REVISION NOTES student exam revising help doc brown iphone ipad notepad notebook netbook epad tablet android. GCSE CHEMISTRY - The Best Free Revision for GCSE Science. GCSE Chemistry Revision. Find past papers and mark schemes for your exams, and specimen papers for new courses. Can’t find your papers? Some question papers are not available online and older question papers and mark schemes are removed from our public website and Secure Key Materials (SKM) after three years because of copyright restrictions (except for Maths and Science).Not sure which exams you're taking?

Ask your school or college.Following consultations with a cross section of teachers across subjects, we will now make all papers and mark schemes available on the AQA website free of charge from about 10 months after the exam (see what's available when). Students may find our Preparing for your exams webpages useful for their revision and exams. Teachers can get past papers earlier, starting 10 days after the exam, from Secure Key Materials.