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TGJ2:
Why do different solvents give different results?
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LINKS |
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| 1. |
In our particle
representations we have shown how the particles of a
substance can grip onto particles of their own
kind. This does not tell us how they might be able to
hold onto particles of a different substance.
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| 2. |
In everyday language
we often use ‘saturated’ to mean ‘full
up’. A saturated solution is ‘full up’
in the sense that no more will dissolve. However, we
avoid any suggestion that this means there is no ‘room’
left: it seems unlikely that there would be enough ‘room’
for 203 g of sugar to dissolve, but not enough for more
than 0.11g of slaked lime, for example. A more complete
treatment of solubility would involve more advanced
issues than can be tackled with this age group: for
now, the explanation of ‘saturated’ has
to remain simply that ‘no more will dissolve’.
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| a
Science Enhancement Programme CD-ROM 2005 |
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user
guide |
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