An ionic stoichiometry question for you... n an environmental test for lead (207.2 g/mol) in soil, the lead is oxidized using permanganate ions in acidic solution, according to the following (balanced) reaction: 5 Pb (s) + 2 MnO4¯ (aq) + 16 H*(aq) → 5 Pb²+ (aq) + 2 Mn²+(aq) + 8 H₂O (1) A 25.0 g sample of soil was found to react with 2.24x10-³ mol of KMnO4. What was the percent composition by mass of lead in the soil sample? A. 4.6%

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".