Ch. 26: Gravimetric Analysis
reacting with the precipitant. e.g., In the gravimetric analysis of Be2+, Mg2+, Ca2+ or Ba2+ with the reagent N-p-chlorophenylcinnamohydroxamic acid, impurities such as Ag+, Mn2+, Zn2+, Cd2+, Hg2+, Fe2+, and Ga3+ are kept in solution by excess KCN. Post-precipitation: Impurities collect on the pure precipitated product while it is standing in the
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