All Practical skills and safety articles – Page 10

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    Standard solution

    A standard solution is a a solution of accurately known concentration prepared from a primary standard (a compound which is stable, of high purity, highly soluble in water and of a high molar mass to allow for accurate weighing) that is weighed accurately and made up to a fixed volume. ...

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    Soxhlet extraction

    When a compound of low solubility needs to be extracted from a solid mixture a Soxhlet extraction can be carried out. The technique places a specialised piece of glassware in-between a flask and a condenser. The refluxing solvent repeatedly washes the solid extracting the desired compound into the flask. ...

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    Mission starlight

    The mission? To protect astronauts from the effects of harmful UV light

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    Weighing compounds using a balance

    Weighing is done to ensure the correct amount of a reactant is added to a reaction, for the preparation of standard solutions or the weighing of a product to calculate a yield. Video: Weighing compounds using a balance video

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    Fractional distillation

    Fractional Distillation is used to separate compounds with boiling points that are close. Video: Fractional distillation video

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    Using a rotary evaporator

    A rotary evaporator is used to remove large amounts of solvent from solutions at a reduced pressure. This is often done to isolate a product from a chromatographic separation or a solvent extraction. Video: Using a rotary evaporator video

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    Running an infrared spectrum

    Infrared (IR) spectroscopy is a technique which reveals the bonds present in a compound and therefore can be used to identify functional groups. A sample of reaction product can be analysed to confirm its composition by comparison to a pure sample, or to judge the extent of reaction by comparison ...

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    Hot gravity filtration

    This is the simplest kind of filtration when the solution to be filtered is poured through a filter paper in a filter funnel. The filtration of hot solutions through a funnel and fluted filter paper is often carried out as part of a recrystallisation. Gravity filtration is generally carried out ...

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    Volatile product distillation

    A technique to remove a volatile product from a reaction mixture to prevent further reaction taking place. Video: Volatile product distillation video

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    Clamping Quickfit glassware

    There are many different ways to assemble apparatus and it is important that you carefully follow the guidelines that might be in the practical script. This section illustrates the basic principles and good practice involved in putting together Quickfit glassware. Video: Clamping Quickfit glassware video

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    Vacuum distillation

    Vacuum distillation is a distillation carried out at reduced pressure to lower boiling points. This is particularly useful for distilling products of boiling points over 100oC. Video: Vacuum distillation video

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    Heating

    There are many instances when heat is needed in a laboratory practical, it is needed to reflux reaction mixtures, to distil liquids as well as help to dissolve solids in recrystallisations. The use of the appropriate method of heating is most important.

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    Understanding experimental planning for advanced level chemistry

    2016-06-03T00:00:00Z

    Investigative practical work

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    Experiment with the Vikings

    2016-05-16T11:50:00Z

    A comprehensive collection of activities to incorporate science into your Vikings lessons. Topics include everyday life; weapons and warfare; travel and trade; and how modern day archaeologists use science to investigate Viking life.

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    Benchmark tools for resourcing practical work

    2016-05-03T10:50:00Z

    The Royal Society of Chemistry works with other organisations on science policy education activites. From this work we have produced a set of comprehensive resourcing benchmark tools for teachers and school practitioners to use when planning budgets and equipping classrooms and laboratories.

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    Opinion

    My favourite demo

    2016-03-09T13:46:00Z

    Ahead of Demo Day, we asked teachers what their favourite chemistry demo is. What's yours?

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    CPD

    Rates of reactions

    2015-12-21T00:00:00Z

    Steve Hacker explains how the concept of reaction rates could be introduced

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    Ideas

    My top five ideas for chemistry lessons

    2015-12-11T13:02:00Z

    Ian McDaid describes his favourite ‘must do’ experiments to engage your students

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    Christmas activities for your chemistry class

    2015-12-08T09:57:00Z

    Team challenges, experiments and puzzles – Kristy Turner keeps students engaged in the run-up to Christmas

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    Experiment

    Microscale preparation of ethyl benzoate

    In association with

    Try this class practical to prepare the ester ethyl benzoate on a microscale by warming ethanol and benzoic acid. Includes kit list and safety instructions.