swap K+/H+ for K+ K+/H+ = 2 log ratio swap Ca++/H+^2 for Ca++ Ca++/H+^2 = 12 log ratio swap Kaolinite for Al+++ Kaolinite = 1 free mmol/kg swap Quartz for SiO2(aq) Quartz = 1e5 free mmol/kg pH = 6 balance off scope y slide log ratio of K+/H+ to 10 fix ratio of Ca++/H+^2 fix pH scope x slide log ratio of Ca++/H+^2 to 20 fix ratio of K+/H+ fix pH suppress Ca2Si3O8^5/2H2O Ca4Si3O10^3/2H2O Ca5Si6O17^11/2H2O Ca5Si6O17^21/2H2O suppress Ca5Si6O17^3H2O Ca6Si6O18^H2O CaSi2O5^2H2O K-feldspar suppress Pseudowollastonite Rankinite Wollastonite