Prior to the 1970s, lead pipes were used for household water piping. Most older homes have had their piping changed to copper or plastic, but some homes still have lead piping.
Your roommate is concerned about possible lead exposure and has requested your help to determine the concentration of lead in your tapwater. You collect a 750 mL sample of tapwater to analyze and bring it to the lab.
Using aliquots of 10 mL, you performed the following procedures: 18.0 mL of 0.09 M EDTA was added to the alliquot which reacted with the Pb in solution.
The solution was then titrated with 0.050 M Cu solution. 10.1 mL of Cu was required.
Calculate the concentration of lead in your tapwater
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