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Anit [1.1K]
3 years ago
15

Twenty-seven pounds (27 lb) of chlorine gas is used for treating 750,000 gal of water each day. The chlorine used up by the micr

oorganisms in the water is measured to be 2.6 mg/L. What is the residual (excess) chlorine concentration in the treated water
Chemistry
1 answer:
worty [1.4K]3 years ago
5 0

Answer:

1.7137\ \text{mg/L}

Explanation:

Chlorine gas available = 27 lbs = 27\times 453.59237=12247\ \text{g}

Amount of water used each day = 750000 gal = 750000\times3.785411784=2839058.84\ \text{L}

Rate at which chlorine gas used = 2.6 mg/L

Chlorine gas used

2839058.84\times 2.6\times 10^{-3}=7381.55\ \text{g}

Residual content of chlorine = 12247-7381.55=4865.45\ \text{g}

Concentration of the residual chlorine is given by

\dfrac{4865.45}{2839058.84}=0.0017137\ \text{g/L}=1.7137\ \text{mg/L}

Concentration of the residual chlorine is 1.7137\ \text{mg/L}.

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