Calculate the pH and percent dissociation of a 0.0375 M HF solution (Ka = 6.8 × 10⁽⁻⁴⁾). If you drop x, prove that the assumption is valid if not derive and solve the quadratic equation.
a) pH = 2.54, % dissociation = 7.8%
b) pH = 3.23, % dissociation = 3.2%
c) pH = 2.89, % dissociation = 5.5%
d) pH = 3.67, % dissociation = 1.9%