Which statement is incorrect?

Which statement is incorrect?
#I.# In a saturated solution the rate of dissolution is equal to the rate of precipitation;
#II.# In a saturated solution, the amount of dissolved solute depends on the amount of undissolved solute on the bottom of the flask.

1 Answer
anor277
Jan 19, 2017

#"Statement II is incorrect........"#

Explanation:

Whereas #"statement I"# seems to be kosher.

For #"statement I"# you have set up an equilibrium between dissolved and undissolved salt. Given equilibrium conditions, the rate of dissolution is equal to the rate of precipitation:

#NaCl(s) rightleftharpoonsNa^(+)(aq) + Cl^(-)(aq)#

But #"statement II"# is whack. The given equilibrium will occur WHATEVER the mass of undissolved salt. The amount of ions in solution is characteristic of a given temperature. Is it clear what I argue?

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