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PP163 - Making a calibration curve for starch using colorimetry
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This provides a method to plot a calibration curve using the starch-iodine reaction. 
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PP134 - Crystal gardens
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Sodium silicate solution (water glass) will precipitate coloured metal silicates that appear to grow like underwater plants.
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GL411 - Water baths and sous vides
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This guide gives general advice about water baths and sous vides, and their use in school science departments.
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GL243 - Water purification buying guide
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A short overview of the common methods of water purification in school laboratories, include pros and cons. This will be useful for any teacher or technician looking to buy a new water purification sy.. more
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R010 - Water purification
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Gives very detailed guidance on what water purification entails, and when pure water is needed in school science. It suggests the advantages and disadvantages of the methods of purification available .. more
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RB105 - Winkler's method for dissolved oxygen
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Guidance on how to prepare and use of the required solutions for the determination of the dissolved oxygen content of water samples using Winkler's method. The procedure described avoids the use of so.. more
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GL381 - Choosing aquaria to keep in the science department
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This document outlines the key points you need to consider when deciding to keep aquaria as pets in the science department. It gives a summary of the three types of aquaria.
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Handbook - Section 13 - Chemistry Topics
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Guidance and information on a range of chemicals, chemistry topics and apparatus including handling chemicals, chemical reactions, gas cylinders and syringes, molecular models, plastics, advanced chem.. more
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PP027 - Making copper sulfate crystals
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A quick and safe method for preparing hydrated copper sulfate crystals from copper(II) oxide and sulfuric acid. The activity involves important techniques such as heating with a water bath, filtration.. more
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Handbook - Section 17 - Fieldwork
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Gives guidance on general fieldwork including specific measurements and techniques. Detailed guidance is included on measuring substances in the soil, water and air, and electronic measurements such a.. more
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