A 10.00-mL sample of blood was diluted to 100.00 mL. 10.00 mL of the resulting solution was analyzed for calcium by precipitating all of the calcium as calcium oxalate, CaC₂O4. The solid CaC₂04 was then re-dissolved in H₂SO4 and titrated with KMnO4. What is the Ca²+ ion concentration in the blood sample expressed as (milligrams Ca²+)/(mL blood) if the endpoint was reached with the addition of 1.14 mL of 0.00886 M KMnO4? 1- 5C₂042 + 2MnO4¹ + 16H¹+ → 2Mn²+ + 10CO₂ + 8H₂O

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Precipitation Titration

Precipitation analysis is used to analyze drugs, and to measure the salt content in food and beverages. It is an important concept from the examination point of view many practical questions are asked on the topic. This topic is significant in the professional exams for both undergraduate and graduate courses, especially for