Lead ions can be precipitated from aqueous solutions by the…
Lead ions can be precipitated from aqueous solutions by the addition of aqueous bromide: Pb2+ (aq) + 2 NaBr (aq) → PbBr2 (s) + 2 Na+ (aq) Lead(II) bromide is virtually insoluble in water so that the reaction appears to go to completion. How many grams of NaBr must be added to 40.0 mL of 0.555 M Pb2+ solution to completely precipitate the lead(II) ion? (If you wish, show your work for possible partial credit.)
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Fill-in-the blank. Make sure to include the plus and negative signs. Do not write spaces. (Example: If the answer is positive four enter +4 not + 4). The chromium atom in K2CrO4 has an oxidation number of [1]. The carbon atom in CO has an oxidation number of [2] The oxidation number of hydrogen in H2 is [3].
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