text: The hydrolysis reaction for a hydrated metal ion in aqueous solution can be written as:
  :p M + q HO ⇌ M(OH) + q H
  and the corresponding formation constant as:
  and associated equilibria can be written as:
  :MO(OH)(s) + z H ⇌ M + (z–x) HO
  :MO(OH)(s) + x HO ⇌ M + z OH
  :p MO(OH)(s) + (pz–q) H ⇌ M(OH) + (pz–px–q) HO