© www.chemsheets.co.uk KS3 022 04-Jan-14. Some substances dissolve in water e.g. salt white solid colourless solution.

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Presentation transcript:

© KS Jan-14

Some substances dissolve in water e.g. salt white solid colourless solution

© KS Jan-14 Some substances dissolve in water e.g. copper sulfate coloured solid coloured solution

© KS Jan-14 Some substances dissolve in water e.g. nickel sulfate coloured solid coloured solution

© KS Jan-14 SOLUBLE Dissolves (e.g. salt in water) INSOLUBLE Does not dissolve (e.g. sand in water)

Is each substance SOLUBLE or INSOLUBLE in water? sugar flour gloss paint sand glass salt

When a substance dissolves: the solid “disappears” the solution is see-through the solution is coloured (if a coloured solid) or colourless (if a white solid) the solution is coloured (if a coloured solid) or colourless (if a white solid) When a substance does NOT dissolve: the solid is still visible in a colourless liquid or the liquid is cloudy

© KS Jan-14 SOLUTE Substance dissolving SOLUTION Solute dissolved in solvent SOLVENT Liquid the solute dissolves in

There are many solvents: e.g. water Saline solution (salt dissolved in water) © KS Jan-14

There are many solvents: e.g. ethanol Iodine tincture (iodine dissolved in ethanol) used as an antiseptic © KS Jan-14

Used to dissolve dirt in dry cleaning There are many solvents: e.g. perchloroethylene © KS Jan-14