Lead ions can be precipitated from solution with KCl according to the following reaction: Pb2+(aq)+2KCl(aq)→PbCl2(s)+2K+(aq) When 28.6 g KCl is added to a solution containing 25.5 gPb2+, a PbCl2 precipitate forms. The precipitate is filtered and dried and found to have a mass of 29.0 g .   Determine the limiting reactant.

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Q: amount (in moles) of the excess reactant is left?

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A: Given data mass of KCl = 28.7 g mass of Pb2+ = 25.8 g Reaction : Pb2+ + 2 KCl → PbCl2 + 2 K+…

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".