. "Examples are alkali metal salts such as sodium chloride, sodium bromide, potassium chloride, potassium sulfate, potassium phosphate, sodium benzoate, sodium acetate, sodium citrate, and potassium nitrate, alkali earth metal salts such as calcium phosphate and calcium nitrate, transition metal salts such as ferric choride, ferrous sulfate, zinc sulfate, cupric chloride, manganese fluoride, and mang" . . . . . . .