DATABASE C:\Programs\phreeqc-trunk\database\redox\redox.dat SOLUTION_MASTER_SPECIES Acetate HAcetate 0.0 Acetate 59. SOLUTION_SPECIES HAcetate = HAcetate log_k 0 HAcetate = Acetate- + H+ log_k -4.7572 SOLUTION 1 Goethite reduction by organic matter pH 7 Na 1 charge Acetate 2 Amm 1 EQUILIBRIUM_PHASES 1 redoxGoethite 0 0.05 REACTION 1 Acetate -1.0 CH3COO 0.7 Ferric -5.6 Ferrous 5.6 CH3COO 0.3 C5H7O2Amm -0.12 0.1 mmol END