| If I was doing an experiment on crystallization,
and I wanted to add an acid to cause the sucrose
to break apart, the crystallization wouldn't
occur, right? Because it causes there to be
different molecules in the solution and they won't
bond together, therefore, there would not be any
crystallization. I am doing an experiment for
class and want to know, if I added an acid, for
example lemon juice, what would happen? Would it
be a good experiment? Thank you for even taking
the time to read my question. Have a great day!|
|Question Date: 2016-03-20|
No, crystallization will not occur if you
add lemon juice. But this has less to do with
the presence of acid than the solvent that comes
with the acid: even if you just add water, sucrose
will dissolve in it (the acid would just speed
up the dissolution process). You have a good
point, though--you're not guaranteed (or even not
likely) to form crystals if you start adding other
compounds into your system.
As for setting up your experiment, yes, you
could test the effects of adding other compounds
to sucrose crystals, but you may be disappointed
by the lack of variety in the answers (probably
any solvent will destroy the crystals). How
about running a test to find out how to make the
best crystals? A common way to form crystals
from a solution is by removing the solvent, either
by changing the temperature (ex. cooling) or by
changing the concentration (ex. evaporation, or
adding more solute).
This experiment isn't going to work because
(1) sucrose needs water to break apart, not just
acid, and (2) even if sucrose did break apart, you
would be left with glucose (which sucrose is made
of), which also crystallizes.
Also, lemon juice is acid because it contains
citric acid and ascorbic acid, both of which also
form crystals if you dry them out.
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