XSIQ
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Chemistry - Chemical equilibrium, reversible reactions - activity 2

Chemical equilibrium, reversible reactions - activity 2

Answer

Many simple processes reach a point where equilibrium is achieved. A
solution becomes saturated when no more of the solute is seen to dissolve
at the particular temperature. However, just because a solution is
saturated does not mean that the solute has stopped dissolving. This can
shown by placing some of the solute containing radioactive atoms in contact
with the saturated solution. Over time some of the radioactive atoms will
be detected in the solution. This behaviour is only possible if the solute
is still dissolving. But the only way a solute can still be dissolving into
a saturated solution without appearing to do so is if an equal amount of
solute is precipitating out of the saturated solution at the same rate.

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