All Resource articles – Page 45

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Recrystallisation

Recrystallisation is a means of purifying solids. If carried out correctly the final product will be both of a high yield as well as pure. Video: Recrystallisation video
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Vacuum filtration

When a solid needs to be isolated from a solution it is normally done at a reduced pressure using a Buchner flask and Buchner funnel. Video: Vacuum filtration video
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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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Space: science ideas webs

A web of suggested ideas for linking science with the topic space. You can learn history and science together with activities for different age groups.
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The Victorians: science ideas webs

A web of suggested ideas for linking science with the topic the Victorians. You can learn history and science together with activities for different age groups.
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The Stone Age: science ideas webs

A web of suggested ideas for linking science with the topic the stone age. You can learn history and science together with activities for different age groups.
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Maya and Aztecs: science ideas webs

A web of suggested ideas for linking science with the topic the Maya and Aztecs. You can learn history and science together with activities for different age groups.
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The Romans: science ideas webs

A web of suggested ideas for linking science with the topic the Romans. You can learn history and science together with activities for different age groups.
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Ancient Egypt: science ideas webs

A web of suggested ideas for linking science with the topic Ancient Egypt. You can learn history and science together with activities for different age groups.
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The Tudors: science ideas webs

A web of suggested ideas for linking science with the topic the Tudors. You can learn history and science together with activities for different age groups.
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The Vikings: science ideas webs

A web of suggested ideas for linking science with the topic the Vikings. You can learn history and science together with activities for different age groups.
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The golden age of Islamic science: science ideas webs

A web of suggested ideas for linking science with the topic the golden age of Islamic science. You can learn history and science together with activities for different age groups.
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World War II: science ideas webs

A web of suggested ideas for linking science with the topic World War II. You can learn history and science together with activities for different age groups.
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Ancient Greece: science ideas webs

A web of suggested ideas for linking science with the topic the Ancient Greece. You can learn history and science together with activities for different age groups.
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Na Lochlannaich: lìontan nam beachdan saidheans

Lìon nam beachdan mollaichte airson ceangal a dhèanamh eadar saidheans agus an cuspair na Lochlannaich. Faodaidh tu eachdraidh agus saidheans ionnsachadh còmhla le gnìomhachasan airson buidhnean de dh’aoisean diofraichte
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An Dàrna Cogadh: lìontan nam beachdan saidheans

Lìon nam beachdan mollaichte airson ceangal a dhèanamh eadar saidheans agus cuspair An Dàrna Cogadh. Faodaidh tu eachdraidh agus saidheans ionnsachadh còmhla le gnìomhachasan airson buidhnean de dh’aoisean diofraichte
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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