Experiment No. 44
Solvent Action of Water on Lead
Put 1 gm. of clean bright lead shavings into a test tube containing 10 cc. of distilled water. After 24 hours decant the clear liquid into a second test tube, acidify slightly with HCL, and add a little hydrogen sulphid water. A black or brownish coloration indicates lead in solution.
(Adapted from Caldwell and Breneman, "Introductory Chemical Practice.")
Under what conditions may lead pipes be objectionable?