An adsorbent surface has N no.of adsorption sites out of which 'n' fraction of sites are occupied . Draw a plot showing relation between 'n' and pressure
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- a) Give any one practical example of adsorption phenomena. b) Mention any FOUR (4) applications of adsorption in chemical analysis.Coprecipitation due to surface adsorption can be minimized by the following except: reducing the surface area, i.e precipitating under conditions where more nuclei are formed and small crystals resulted Carrying out a separation of ions that would be strongly adsorbed or replacing it with strongly absorbed ions lowering the oxidation number of metal ions so that it's charge reduced using hot solutions to reduce the amount of adsorption per unit area5g of a catalyst adsorbs 400cm3 of N2 at stp to form a monolayer. What is the. Surface area per Gram if the area occupied by a molecule of N2 is 16A
- Describe how does the extent of adsorption varies with pressure by freundlich adsorption isotherm?Confirm that the following CO adsorption data on activated carbon at 273 Kfollow the Langmuir or Freundlich isotherm and determine the volumecorresponding to the complete coverage of the surface.ADSORPTION STUDIES Aim: To determine the adsorption constants for the adsorption isotherm of Oxalic acid (C2H2O4) on activated carbon. I want Discussion and Analysis for that
- The volume of O2(g) adsorbed on a surface of 1 g of a silica sample at 5°C is V1=1.4 cm3 at P1=95.1 torr and V2=10.6 cm3 at P2=760 torr. Identify the maximum volume of oxygen, Vm, that can be adsorbed. Consider the Langmuir isotherm modelIf the adsorption of a gas onto a surface is found, somewhat unusually, to be endothermic, what can be said about the entropy change on adsorption?The average time for which an oxygen atom remains adsorbed to a tungsten surface is 0.36 s at 2548 K and 3.49 s at 2362 K. What is the activation energy for desorption?
- Calculate the isosteric enthalpy of adsorption from the following results which were obtained for the adsorption of 0.145 cm3, at STP, of nitrogen on charcoal: Temperature (K) Pressure (kPa) 195 156 244 380 273 567 Answer is [-7.53 kj/mol]What is the difference between effect of pH and Point of zero charge with regards to AdsorptionOne gram of activated charcoal has a surface area of 1000 m². If complete surface coverage is assumed, as a limiting case, how much ammonia at 25°C and 1 bar, could be adsorbed on the surface of 45 g of activated charcoal? The diameter of the NH3 molecule is 3 x 10-10 m, and it is assumed that the molecules just touch each other in a plane so that four adjacent spheres have their centres at the corners of a square. O 25.9 L 17.8 L 20.6 L - 150L None of the choices