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How to solve: A solution of K2Cr2O7 is standardized against Fe(NH4)2(SO4)2 6H20. Exactly 0.625g of the...

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Chemistry

How to solve: A solution of K2Cr2O7 is standardized againstFe(NH4)2(SO4)2 6H20. Exactly 0.625g of the iron salt are equivalentto 22.5 mL of the dichromate solution. A sample of unknown iron(II) is then titrated with the dichromate. Exactly 25.0 mL of theiron are equivalent to 18 mL of the K2Cr2O7 solution. Calculate thenumber of millimoles of iron per mL of unknown solution. The answeris 2.98 mg/mL

Answer & Explanation Solved by verified expert
3.6 Ratings (413 Votes)
6 FeNH42SO42 7H2SO4 K2Cr2O7 3Fe2SO43 Cr2SO43 6NH42SO4 K2SO4 7H2O Mohrs salt FeNH42SO42 6H20molar mass39213gmol Moles of the saltmassmolar mass0625g39213gmol000159 moles Given    See Answer
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