Consider the iron salt, ferric sulfate – Fe2(SO4)3 9H2O, is added to influent water for
particle destabilization. (25 points)
a. Write the overall reaction for the formation of iron (III) hydroxide – Fe(OH)3
b. Calculate the number of moles of precipitated iron (III) hydroxide for 843 gm
of iron salt.
c. Calculate the total alkalinity, in mg/L as CaCO3, required to neutralize the
hydrogen ions generated from adding 843 gm of iron salt.