SOLUTIONS
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Some substances dissolve in water e.g. salt
white solid
colourless solution
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Some substances dissolve in water e.g. copper sulfate
coloured solid
coloured solution
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Some substances dissolve in water e.g. nickel sulfate
coloured solid
coloured solution
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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
sandglass
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)
When a substance does NOT dissolve:• the solid is still visible in a colourless
liquid or • the liquid is cloudy
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SOLUTESubstance dissolving
SOLUTIONSolute dissolved
in solvent
SOLVENTLiquid the solute
dissolves in
There are many solvents:
e.g. water
Saline solution(salt dissolved in water)
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There are many solvents:
e.g. ethanol
Iodine tincture(iodine dissolved in ethanol)
used as an antiseptic
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Used to dissolve dirt in dry cleaning
There are many solvents:e.g. perchloroethylene
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