Describe the transfer of thermal energy as the ice cream melts and as it becomes solid again. In both situations, describe which
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pH = 2.1
Let resembles the acid; as a weak acid (a small value of
)
would partially dissociate to produce protons
and
, its conjugate base. Let the final proton concentration (i.e.,
) be
. (Apparently
) Construct the following RICE table:
By definition, (all concentrations are under equilibrium condition)
It is given that
Equating and simplifying the two expressions gives a quadratic equation; solve the equation for gives:
The pH of a solutions equals the opposite of the logarithm of its proton concentration to base 10; thus for this particular solution