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 ?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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have a rate 13.124. Testing for a Banned Herbicide Sodium chlorate w in EU countries since 2009. A simple colorimetric test for the presence of the chlorate ion in a solution of herbicide was used relies on the following reaction: 2 MnO4 (ag) + 5 C103 (aq) + 6 H*(aq) → 2 Mn2+ (aq) + 5 C104¯(ag) + 3 H,0(0) The table contains rate data for this reaction. [CIO3 ]o (M) [H*]% (M) Initial Rate [MnO4 lo (M) (Mis) Experiment 5.2 X 10 0.10 0.10 0.10 1 3.3x 10 0.10 0.10 0.25 1.6 x 10 0.10 0.30 0.10 7.4 X 103 0.20 0.10 0.10 4 HO THE Determine the rate law and the rate constant for this reaction. 3,125 T 3.
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3 g of activated charcoal is added into 2 L of a solution containing organic dye X. The initial concentration of the dye is 1000 ppm and the concentration after removal of the activated charcoal removed is 400 ppm. ■ Calculate how many mg of organic dye X are adsorbed on the activated charcoal. ■ Calculate the ability of activated charcoal to adsorb dye X (expressed in weight to weight ratio).
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Consider the dissolution of CaSO4 in pure water, what is the relationship between the solubility, s, and the concentrations of Ca2* and SO,2, assuming no complicating reactions. O 25 = [Ca2*] = [SO,21 %3D O 25 = [Ca2*] + [SO42] O = [Ca2*] = [SO4²-] %3D O s = [Ca2*] [SO,²] O s = [Ca2*] + [SO,²] O 25 = [Ca2*] + [So,2] %3D
A solution contains 0.10 M Sr(NO3)₂ and 0.20 M Bi(NO₂). When solid Na AsO is added to the solution a precipitate forms. What concentration of AsO ³ maintains maximum separation of Sr²+ and Bi³+? Ksp of Sr₂(AsO₂)₂ = 4.29 x 10-1⁹ and BIASO = 4.43 x 10-1⁰ 4 4/2
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