Determine [OH⁻], pH, and pOH of a 0.13 M ammonia solution. For NH₃, Kb=1.76x10-5.
a) [OH⁻] = 7.69x10-3 M, pH = 11.12, pOH = 2.88
b) [OH⁻] = 1.76x10-5 M, pH = 9.12, pOH = 4.88
c) [OH⁻] = 1.76x10-5 M, pH = 4.88, pOH = 9.12
d) [OH⁻] = 7.69x10-3 M, pH = 2.88, pOH = 11.12