Exam #4 Key

Extra credit (6 pts)Answer the three following questions about how the approximation method would be used todetermine equilibrium concentrations for the reactants and products in general acid ionizationreaction below.HA + H 2 O A - + H 3 O +1. Explain the rationale for why the approximation method is justified in determiningequilibrium concentrations.The change in concentration of the weak acid or base will be small in comparison to thestarting concentration.2. What signals do you look for a clue that it might be appropriate in a given case?High concentrations (>0.1 M)and low K values (