Adsorption experim ent Reaction between FeS and HCl: wwww FeS+2HC1-FeCl2+H2S Reaction on filtration sheet: H2S+Pb(CH:CO0)2-PbS+2CH3COOH STEP1 Put some FeS particles into a big tube. Add1 or 2 mL of 18% HCl solution onto FeS particles. Immediately close the tube with Pb(NO3)2 or Pb(CH:COO)2 immersed wwwww filtration sheet. 1. Why filtration sheet turned black in step1? STEP2 Put some Fes particles into a big tube. Fix the "glass funnel" (glass pipette) to the tube after adding HCl solution. Close the outlet of funnel with Pb(NO3)2 or Pb(CH:COO)2 immersed filtration sheet. 1. Why filtration sheet didn't turn black in step2 ?

Adsorption experim ent Reaction between FeS and HCl: wwww FeS+2HC1-FeCl2+H2S Reaction on filtration sheet: H2S+Pb(CH:CO0)2-PbS+2CH3COOH STEP1 Put some FeS particles into a big tube. Add1 or 2 mL of 18% HCl solution onto FeS particles. Immediately close the tube with Pb(NO3)2 or Pb(CH:COO)2 immersed wwwww filtration sheet. 1. Why filtration sheet turned black in step1? STEP2 Put some Fes particles into a big tube. Fix the "glass funnel" (glass pipette) to the tube after adding HCl solution. Close the outlet of funnel with Pb(NO3)2 or Pb(CH:COO)2 immersed filtration sheet. 1. Why filtration sheet didn't turn black 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

Chapter9: Atomic Absorption And Atomic Fluorescence Spectrometry

Section: Chapter Questions

Problem 9.22QAP: The chromium in an aqueous sample was determined by pipetting 10.0 ml. of the unknown into each of...

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For a solution in which μ = 7.0 x 10-2, calculate K'sp for a. AgSCN (Ksp (AgSCN) = 1.1 × 10-¹2, Ag+ = 0.25, ascN = 0.35) K's = sp b. Pbl₂ (Ksp (PbI2) = 7.9 x 10-9, apb²+ = 0.45, ar = 0.3) K'sp = c. La(103) 3 (Ksp (La(103) 3) = 1.0 x 10-¹¹, L²+ = 0.9, 10,- = 0.35) K'sp =
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