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Author Question: An industrial plant processes its waste water through a sedimentation tank that removes hazardous ... (Read 73 times)

V@ndy87

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on: Mar 21, 2021

Question 1

A solution is prepared from 3.5 × 102mL of 3.2 M Pb(NO3)2 and 2.0×102 mL of 0.020 M NaCl. Given that Ksp for lead chloride is 1.6×10-5, what is the equilibrium concentration of the chloride ion?
Reference: Ref 16-1

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◦ 3.9 × 10–4
◦ 8.0 × 10–6
◦ 2.8 × 10–3
◦ 6.1 × 10–2
◦ None of these are correct.

Question 2

An industrial plant processes its waste water through a sedimentation tank that removes hazardous metals by precipitating them as insoluble carbonate salts. If sodium carbonate is gradually added to the tank, what would be the order of precipitation of the metals, Pb2+, Cu2+, Hg22+, and Zn2+if each is ≈ 1.0 × 10–4M? ( Kspof PbCO3= 7.4 × 10–14, Kspof CuCO3= 1.4 × 10–10, Kspof Hg2CO3= 8.9 × 10–17, and Kspof ZnCO3= 1.4 × 10–11)

◦ Pb2+, Hg22+, Zn2+, Cu2+
◦ Hg22+, Pb2+, Zn2+, Cu2+
◦ Cu2+, Zn2+, Pb2+, Hg22+
◦ Cu2+, Zn2+, Hg22+, Pb2+
◦ All metal ions will precipitate at the same time.
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Marked as best answer by V@ndy87 on Mar 21, 2021

tsternbergh47

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Reply #1 on: Mar 21, 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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V@ndy87

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Reply 2 on: Mar 21, 2021
Excellent

dantucker

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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