In the preparation of Alum, we used (3 mole) reacted with (25 ml) of (1 M) KOH solution and the resulting mass of Alum was (8.5 gm). Caleulate the percent (%) of Alum yield? (M.wt: K=39, Al-27, S-32, H=1).

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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".