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Showing results 1 to 10 of 81
An updated method of staining gram-positive and gram-negative bacteria using basic equipment.
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The additional negative ions test tube reactions for nitrate(III), nitrate(V), sulfate(IV), phosphate and carboxylates (methanoate and ethanoate).
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Guidance on how to prepare the stains needed for gram staining - to distinguish between Gram-positive and Gram-negative bacteria.
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Guidance on how to prepare reagents used to test for the presence of anions. This Recipe only includes those reagents that are not covered by other Recipe Sheets.
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The common negative ions, carbonate (CO32-),
sulfate(VI) (SO42-) and the halides (Cl–, Br–
and I–) can be simply tested for in test tube reactions. The method
described here uses a more dilute ammo..
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Common anions are tested on a plastic covered worksheet, for quick easy disposal. Using solutions with minimum concentrations allows closer observations and initiates talking points. Students can phot..
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Most A-Level Physics syllabi require students to sketch various
combinations of electric field patterns (e.g. a positive point charge
and negative point charge, or a positive point charge to a neg..
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Testing for negative ions - halide ions
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Testing for negative ions - sulfate (IV)
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Testing for negative ions - nitrate(III) and nitrate(V)
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Showing results 1 to 10 of 81
