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- https://chem.libretexts.org/Bookshelves/General_Chemistry/ChemPRIME_(Moore_et_al.)/18%3A_Chemical_Kinetics/18.12%3A_Heterogeneous_CatalysisSuch a catalytic converter contains from 1 to 3 g Pt in a fine layer on the surface of a honeycomb-like structure or small beads made of Al 2 O 3 . The catalyst speeds up oxidation of unburned hydroca...Such a catalytic converter contains from 1 to 3 g Pt in a fine layer on the surface of a honeycomb-like structure or small beads made of Al 2 O 3 . The catalyst speeds up oxidation of unburned hydrocarbons and CO which would otherwise be emitted from the exhaust as air pollutants.
- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(LibreTexts)/31%3A_Solids_and_Surface_Chemistry/31.07%3A_Isotherms_are_Plots_of_Surface_Coverage_as_a_Function_of_Gas_Pressure_at_Constant_TemperatureThis page examines the equilibrium between gas molecules and adsorbed species on solid surfaces, introducing the Langmuir isotherm, which connects surface coverage to gas pressure at constant temperat...This page examines the equilibrium between gas molecules and adsorbed species on solid surfaces, introducing the Langmuir isotherm, which connects surface coverage to gas pressure at constant temperature. The isotherm predicts increased surface coverage with rising pressure until a monolayer is achieved. The derivation involves temperature-dependent constants and assumptions about surface site energies, emphasizing the importance of constant enthalpy of adsorption for the model's validity.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Instrumental_Analysis_(LibreTexts)/26%3A_Introduction_to_Chromatographic_Separations/26.01%3A_A_General_Description_of_ChromatographyIn chromatography we pass a sample-free phase, which we call the mobile phase, over a second sample-free stationary phase that remains fixed in space. We inject the sample into the mobile phase where ...In chromatography we pass a sample-free phase, which we call the mobile phase, over a second sample-free stationary phase that remains fixed in space. We inject the sample into the mobile phase where its components partition between the mobile phase and the stationary phase. The types of mobile phases and stationary phases, how these two phases contact each other, and how the solutes interact with the two phases are useful ways describe a chromatographic method.
- https://chem.libretexts.org/Courses/Martin_Luther_College/Organic_Chemistry_-_MLC/02%3A_Tools_of_Organic_Chemistry/2.01%3A_Intermolecular_Forces_(IMFs)_-_Review/2.1.03%3A_ChromatographyChromatography is an efficient way for chemists to separate and analyze mixtures. Read on to find out how this critical process works.
- https://chem.libretexts.org/Courses/University_of_North_Texas/UNT%3A_CHEM_1410_-_General_Chemistry_for_Science_Majors_I/Text/10%3A_Solids_Liquids_and_Solutions/10.23%3A_ChromatographyChromatography is an efficient way for chemists to separate and analyze mixtures. Read on to find out how this critical process works.
- https://chem.libretexts.org/Bookshelves/General_Chemistry/ChemPRIME_(Moore_et_al.)/10%3A_Solids_Liquids_and_Solutions/10.23%3A_ChromatographyChromatography is an efficient way for chemists to separate and analyze mixtures. Read on to find out how this critical process works.
- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(LibreTexts)/31%3A_Solids_and_Surface_Chemistry/31.06%3A_Atoms_and_Molecules_can_Physisorb_or_Chemisorb_to_a_SurfaceThis page explores the energetics and kinetics of adsorption, focusing on the potential energy curve of adsorbates near surfaces. It contrasts physisorption, which involves weak van der Waals forces, ...This page explores the energetics and kinetics of adsorption, focusing on the potential energy curve of adsorbates near surfaces. It contrasts physisorption, which involves weak van der Waals forces, with chemisorption, characterized by stronger chemical bonds. The text outlines the adsorption process of hydrogen molecules (H2), discussing two pathways: direct chemisorption and precursor-mediated chemisorption, which includes initial physisorption.
- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(LibreTexts)/31%3A_Solids_and_Surface_ChemistryThis page explains the unit cell as the essential component of crystalline solids, detailing concepts such as Miller indices for lattice orientation and X-ray diffraction for lattice measurement. It a...This page explains the unit cell as the essential component of crystalline solids, detailing concepts such as Miller indices for lattice orientation and X-ray diffraction for lattice measurement. It addresses the connection between structure factors and electron density via Fourier transforms, surface adsorption with the Langmuir isotherm, and the influence of surface structure on chemical reactions.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Analytical_Chemistry_2.1_(Harvey)/08%3A_Gravimetric_Methods/8.04%3A_Particulate_GravimetryThe page discusses various gravimetric methods, particularly focusing on particulate gravimetry. It covers direct precipitation and the method of separating analytes already in particulate forms using...The page discusses various gravimetric methods, particularly focusing on particulate gravimetry. It covers direct precipitation and the method of separating analytes already in particulate forms using filtration and extraction techniques. Filtration uses different filters based on the particle size, while extraction involves separating analytes from a matrix using a suitable solvent.
