STEP1 Put some FeS particles into a big tube. Add 1 or 2 mL of 18% HCl solution onto FeS particles. Immediately elose the tube with Pb(NO3)2 or Pb(CH:CO0)2 immersed filtration sheet. STEP2 Follow the same steps up to closing tube by filtration sheet. Fix the glass funnel to the tube aft er adding HCl solution. Close the outlet of funnel with Pb(NO3)2 or Pb(CH COO)2 immersed filtration sheet. Reaction between FeS and HCl: FeS+2HCI FeCl2+H2S Reaction on filtration sheet: H2S+Pb(CH COO)2-PbS+2CH:COOH 1. Why filtration sheet turned black in step1? 2. What happened filtration sheet in step2?

STEP1 Put some FeS particles into a big tube. Add 1 or 2 mL of 18% HCl solution onto FeS particles. Immediately elose the tube with Pb(NO3)2 or Pb(CH:CO0)2 immersed filtration sheet. STEP2 Follow the same steps up to closing tube by filtration sheet. Fix the glass funnel to the tube aft er adding HCl solution. Close the outlet of funnel with Pb(NO3)2 or Pb(CH COO)2 immersed filtration sheet. Reaction between FeS and HCl: FeS+2HCI FeCl2+H2S Reaction on filtration sheet: H2S+Pb(CH COO)2-PbS+2CH:COOH 1. Why filtration sheet turned black in step1? 2. What happened filtration sheet in step2?

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter33: Automated Methods Of Analysis

Section: Chapter Questions

Problem 33.6QAP

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