All Practical skills and safety articles – Page 8

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    Encouraging inquiry-based approaches

    2016-09-28T00:00:00Z

    Manage the load for students

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    Explaining our health and safety guidance

    Review and understand our standard health and safety guidance before using the resources for practical chemistry in your classroom. The information in this document can increase your confidence and competence when using our practical resources, by raising your awareness of what our health and safety checks entail

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    Measurement, accuracy and precision

    2016-08-10T11:43:00Z

    The nature of science resources try to give students an awareness of science as a changing body of knowledge. This resource contains activities for students which help them discover the importance and difficulties of accurate experimentation.

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    Review

    Green chemistry: laboratory manual for general chemistry

    2016-08-05T00:00:00Z

    An introduction to green chemistry and 21 experiments ready for use in the classroom or teaching laboratory

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    Recycling the undesired enantiomer of Naproxen

    This context/problem-based learning (C/PBL) resource is part of a collection we have commissioned for you to use with your undergraduate students. This 5 credit module is based on the following scenario: Your students work for a company that produces (S)-naproxen, a non-steroidal anti-inflammatory drug (NSAID), via a racemic method. ...

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    The 2011 International Year of Chemistry Experiment

    2016-08-03T15:24:00Z

    Worksheets and data from the 2011 mass participation experiment. Measure the acidity (pH) and salinity of your local water.

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    Thin layer chromatography

    The technique of Thin Layer Chromatography (TLC) is normally used as an analytical method to follow the progress of a reaction, to analyse mixtures or to establish conditions for a preparative separation of compounds using column chromatography. The stationary phase (often silica) is coated on plastic or aluminium plates. The ...

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    The interactive lab primer - working safely

    The chemistry laboratory is full of hazards and it is your responsibility to work safely for your own well-being and for the well-being of others. Use this resource to understand the basic rules and procedures that should be followed to minimise any risks.

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    The interactive lab primer - lab apparatus

    Use this resource to show students the standard pieces of equipment found in most university and research chemistry laboratories.

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    Explosives Guide for Education

    2016-07-11T14:56:00Z

    This Guide contains information for teachers on the Explosive Regulations 2014. It details when Explosive Certifiates are required by schools and how to get them. There are some websites for more detailed information.

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    Column chromatography

    The separation of mixtures produced in chemical reactions is often carried out by passing the mixture through a stationary phase of silica held in a column. Solvents move compounds at different rates through the silica allowing them to be separated into fractions by collecting the emerging solvent. This can ...

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    Heating under reflux

    The term ‘reflux’ describes an arrangement in which a reaction is carried out in a boiling solvent with the vapour being condensed and returned to the reaction vessel. Refluxing is carried out when reactions need to be heated to give a reasonable yield of product in a reasonable time. ...

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    Dean-Stark apparatus

    There are many equilibrium reactions that yield water as a co-product. It is the co-produced water that prevents a high yield of product being obtained. The removal of the water is necessary to drive the reaction to completion and this is done using Dean-Stark apparatus. The reaction is carried out ...

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    Steam distillation

    The extraction of a crude mixture containing water-insoluble material (such as natural products) can be achieved by co-distillation with steam. Video: Steam distillation video

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    Melting point determination

    The measurement of melting points is a relatively straightforward procedure that is carried out to determine the purity of a compound or to assist with its identification. A pure compound will melt over a relatively narrow temperature range, impurities both lower and widen the temperature range over which a compound ...

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    Drying liquids

    There are many instances when it is necessary to remove traces of water from a solution or liquid. One common example is the drying of an organic layer after a solvent extraction. The technique involves adding a suitable solid drying agent to the liquid followed by its removal by gravity ...

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    Titration

    The addition of one reagent (the titrant) from a burette to another reagent until an end-point is reached is known as a titration. These have to be done with great care and precision to establish reliable and accurate results. Video: Titration video

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    Cooling mixtures

    Cooling baths are very useful in chemistry labs to control exotherimc reactions. In this resource we share various recipes for making cooling baths to temperatures below 0°C. There are many instances where you will need cooling as part of the procedure, for example in recrystallisation, carrying out reactions at ...

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    Distillation

    Distillation separates liquids on the basis of them having different boiling points. Video: Distillation video

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    Solvent extraction

    2016-06-16T11:32:00Z

    This technique uses two solvents which are immiscible, for example an organic solvent such as diethyl ether can be used to extract an organic compound from an aqueous solution leaving water soluble impurities behind. A variation of this is acid - base extraction where acidic or basic compounds are extracted ...