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Author Question: A homeowner in Boston becomes concerned that there may be appreciable amounts of lead in her ... (Read 35 times)

CQXA

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on: Jul 8, 2021
A homeowner in Boston becomes concerned that there may be appreciable amounts of lead in her drinking water due to 150-year old water pipes in her house. Consequently, she takes a sample of her drinking water in to be analyzed. The laboratory technician, who is new on the job, has been told to analyze by precipitating the lead ion as the iodide (Ksp = 7.1 × 10-9 for PbI2(s)) by slowly adding small portions of 1.00 M NaI(aq) solution.

If we assume that the concentration of lead in the solution is 1.00 mg/liter or approximately 4.8 × 10-6 M (this would be 1.0 part per million) is it possible to detect the lead in the drinking water by adding a total of no more than 10.0 mL of NaI(aq) solution to a 100 mL sample of drinking water? You must of course consider dilution effects. What is Qsp?
◦ yes, Qsp = 4.0 × 10-7
◦ yes, Qsp = 3.6 × 10-8
◦ no, Qsp = 1.6 × 10-13
◦ no, Qsp = 3.6 × 10-8
◦ no, Qsp = 4.0 × 10-7
General Chemistry: Principles and Modern Applications ¦ Petrucci, Herring, Madura, Bissonnette ¦ 11th Edition
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Marked as best answer by CQXA on Jul 8, 2021

alexisweber49

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Reply #1 on: Jul 8, 2021
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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CQXA

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Reply 2 on: Jul 8, 2021
Great answer, keep it coming :)

alvinum

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Reply 3 on: Yesterday
Gracias!

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