Materials Chemical Composition Molecular Weight Used Concentration Potassium phosphate dibasic K2HPO4 174.18 g/mol 5,10,20 mM Potassium bicabonate KHCO3 100.12 g/mol 5,10,20 mM Potassium sulfate K2SO4 174.26 g/mol 5,10,20 mM Potassium silicate K2SiO3 154.28 g/mol 5,10,20 mM

Table 1: Chemical formula of potassium salts.