You dissolve 150.0 grams of a mixture of MgCl₂ and KCI in water, add a solution of excess AgNO3, and precipitate all of the chloride ion as AgCl. After filtration and drying, you find that you have formed 331.0 grams of AgCl. What is the mass in grams of KCl that was in the original 150.0 grams of mixture?

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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".