Sodium hypochlorite (NaOCI, available at a strength of 14% and SG=1.0) is used as a disinfectant at a water treatment plant that processes 25 mgd of water. When added to water, sodium hypochlorite undergoes the reactions shown below. The facility would like to achieve an initial hypochlorite dose of 4.5 mg/L OCl and will disinfect the water pH = 7.0. The disinfection chamber will have a L:W:D ratio of 60:1:1. Reaction #1: NAOCI → Na* + OCI- HOCI E→ H* + OCI no pKa...reaction proceeds to completion pK, = 7.6 Reaction #2: a. Based on Reaction #1, how much NaOCI (in gal/min) will be required to achieve the target dose? b. If the facility would like to maintain a 2-week supply of sodium hypochlorite, what storage volume is required (in 1,000 gallons)?

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