Asked by Kaleen
                Monochloroacetic acid, HC2H2ClO2, is a skin irritant that is used in "chemical peels" intended to remove the top layer of dead skin from the face and ultimately improve the complexion. The value of Ka for monochloroacetic acid is 1.35  10-3. Calculate the pH of a 0.22 M solution of monochloroacetic acid. 
            
            
        Answers
                    Answered by
            DrBob222
            
    monochloroacetic acid is HA.
...............HA ==> H^+ + A^-
initial.......0.22....0......0
change.........-x.....x.......x
equil.......0.22-x....x.......x
Substitute into the expression for Ka and solve for H^+, then convert to pH.
    
...............HA ==> H^+ + A^-
initial.......0.22....0......0
change.........-x.....x.......x
equil.......0.22-x....x.......x
Substitute into the expression for Ka and solve for H^+, then convert to pH.
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