What is the concentration of se in the soil in parts

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Selenium in 10.0g of a soil sample is extracted as selenium trioxide ion, which is determined iodometrically requiring 4.5mL of thiosulfate. If the thiosulfate reacts with a dichromate solution 0.049mg K2Cr2O7 / mL, What is the concentration of Se in the soil in parts per million?

Reference no: EM132410154

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