Question

Problem Statement A spent 1.0 percent caustic soda solution (PNaOH = 8.42 lb/gal) with a volumetric flow rate of 3.0 gpm is to be neutralized using either sulfuric acid or hydrochloric acid. First, determine the mass flow rate (Ib/day) of NaOH in the spent caustic soda solution, and then use that value to determine the stoichiometric amounts (Ib/day) of: 1. H2SO4 required for neutralizing the OH ions contributed by the spent caustic soda. [Hints: (1) write the balanced chemical equation for the acid-base reaction between NaOH and H2SO4, and use it to establish the stoichiometric weight ratio H2SO4 : NaOH.] 2. HCl required for neutralizing the OH ions contributed by the spent caustic soda. (Hints: (1) write the balanced chemical equation for the acid-base reaction between NaOH and HCI and use it to establish the stoichiometric weight ratio HCI : NaOH.]

Answer 1

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