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A 200.0 mL sample of water was titrated with 0.00355 M K2Cr2O7 to determine chemical oxygen...

A 200.0 mL sample of water was titrated with 0.00355 M K2Cr2O7 to determine chemical oxygen demand. If it required 26.3 mL of potassium dichromate to reach the end point, what is the COD of water in mg O2/L?

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