How can I decrease the amount of NaOH that reacts completely with FeCl2 + FeCl3?

27 June 2023 0 5K Report

I'm experimenting on inorganic pigments, specifically iron oxide pigments. According to the reaction equation, FeCl3 and FeCl2 react with NaOH in ratio 325:127:320. Is there a way to decrease the amount of NaOH required to react completely with FeCl3 and FeCl2? How can I complete the reaction to make maximum final product without using more NaOH?

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