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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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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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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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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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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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RB020 - Calcium hydroxide
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Guidance on how to prepare calcium hydroxide (Limewater).
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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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HC010B - Barium compounds, other
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Hazcard – COSHH model risk assessment for barium oxide, barium hydroxide-8-water, barium diphenylamine sulfonate (diphenylamine-4-sulfonic acid (barium salt)) and barium sulfate(VI) (barium sulfate, b.. more
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PP061 - Microscale Cracking of Liquid Paraffin
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This important procedure illustrates the conversion of saturated hydrocarbons, which are used for fuels, into the more chemically useful unsaturated hydrocarbons, used in making plastics. The alkenes .. more
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