Five very different samples were analyzed. The goal is to establish if the methods are equivalent. That is, if they give results that are indistinguishable. Atomic spectral profiles are on the order of 0.001 nm wide. For AA to be a useful quantitative elemental method, the apparatus must reproducibly a . ionize the analyte b .
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You need to know the relative amounts of each solution to calculate the correct answer. For almost all practical volumes that one might use, this precipitate will form. K sp for PbCl 2 is 1.7x10 -5 . The molar concentration of chloride is twice the molar solubility of the salt. The dissolution of the lead chloride adds a bit more chloride to the 0.100 M already present, giving a bit more than 0.100 M chloride.