A-level Chemistry/OCR (Salters)/Colour by Design
< A-level Chemistry < OCR (Salters)
Realgar is an orange-red mineral used as a pigment in ancient times. Pararealgar is orange-yellow. They have different colours because they have different crystal structures, despite having the same empirical formula, AsS. The crystal structures of realgar and pararealgar contain differently-connected As4S4 molecules − these are shown above, realgar to the left, pararealgar to the right.
Colour by Design is the eleventh unit in the Salters Advanced Chemistry course.
Chemical Storylines sections
- CD1 Ways of making colour
- CD2 The Monastral Blue story
- CD3 Chrome Yellow
- CD4 Chemistry in the art gallery
- CD5 At the start of the rainbow
- CD6 Chemists design colours
- CD7 Colour for cotton
- CD8 High-tech colour
- CD9 Summary
Chemical Ideas sections
- 6.7 Where does colour come from? (revision)
- 5.1 Ions in solids and solutions (revision)
- 6.8 Ultraviolet and visible spectroscopy
- 13.6 Oils and fats
- 7.3 Chromatography
- 6.1 Light and electrons (revision)
- 12.3 Arenes
- 12.4 Reactions of arenes
- 13.10 Azo compounds
- 6.9 Chemistry of colour
Activities
- CD1 Changing colours chemically
- CD3 Seeing colours
- CD4.1 Using reflectance spectra to identify pigments
- CD4.2 What factors affect the drying potential of an oil?
- CD4.3 Investigating paint media
- CD4.4 Identifying a pigment
- CD4.5 Finding a perfect match
- CD5 Comparing hydrocarbons
- CD6 Making azo dyes
- CD7.1 Dyeing with a direct dye and a reactive dye
- CD7.2 Different dyes for different fibres
- CD9 Check your notes on Colour by Design
External links
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