4.88. A quality control technician needs to determine the percentage of arsenic (As) in a particular pesticide. The pesticide is dissolved and all of the arsenic present is converted to arsenate ions (AsO4³-). Then the amount of AsO,³- is determined by titrating with a solution containing silver ions (Ag†). The silver reacts with the arsenate according to the following net ionic equation: 3 Ag* (aq) + AsO4 (aq) → Ag3 AsO4(s) When a 1.22-g sample of pesticide was analyzed this way, it required 25.0 mL of 0.102 M Ag* solution to precipitate all of the AsO,.What was the mass percentage of arsenic in the pesticide?

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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".