A pieceof plumber's solder weighting 3.0 gm was dissolved in dilute nitric acid, then treated with dilute H_(2)SO_(4) . This precipatated the lead as PbSO_(4) which after washing and dryingweighted 2.98 gm. The solution was then neutralized to precipatatestannic acid, which was decomposed by heating, yielding 1.27 gm SnO_(2) . What is the analysis of the solder? (Pb=207.2 amu, Sn=118.7 amu)

A pieceof plumber's solder weighting 3.0 gm was dissolved in dilute ni

1.	A pieceof plumber's solder weighting 3.0 gm was dissolved in dilute nitric acid, then treated with dilute H_(2)SO_(4) . This precipatated the lead as PbSO_(4) which after washing and dryingweighted 2.98 gm. The solution was then neutralized to precipatatestannic acid, which was decomposed by heating, yielding 1.27 gm SnO_(2) . What is the analysis of the solder? (Pb=207.2 amu, Sn=118.7 amu)
Answer» 66.7 % PB, 33.3% Sn 33.3% Pb, 1 gm Sn 1 gm Pb, 2 gm Sn 2 gm Pb, 1 gm Sn Answer :A::D