Base your answers
to questions 76 through 78 on the information below.
A student makes an aqueous solution of lactic acid. A formula for one
form of lactic acid is shown below.
The solution is placed in a sealed flask to be used in a laboratory
investigation. The equation below represents the lactic acid equilibrium
system in the flask.
76 Identify one organic functional group in a molecule of lactic
77 Explain, in terms of the reaction rates, why the
concentrations of the reactants and products remain constant in this
|Answer-->reaction rates are equal
78 Explain, in terms of LeChatelierís principle, why increasing the
concentration of H+(aq) increases the
concentration of lactic acid. 
|Answer-->equilibrium shifts left