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  2. Molecular graph - Wikipedia

    en.wikipedia.org/wiki/Molecular_graph

    In chemical graph theory and in mathematical chemistry, a molecular graph or chemical graph is a representation of the structural formula of a chemical compound in terms of graph theory. A chemical graph is a labeled graph whose vertices correspond to the atoms of the compound and edges correspond to chemical bonds.

  3. Frost diagram - Wikipedia

    en.wikipedia.org/wiki/Frost_diagram

    The slope of the line between any two points on a Frost diagram gives the standard reduction potential, E°, for the corresponding half-reaction. On the Frost diagram for nitrogen here below, the slope of the straight line between N 2 (at the origin of the plot) and nitrite ( HNO 2 / NO − 2 ) being slightly more pronounced than for nitrate ...

  4. Chemical graph theory - Wikipedia

    en.wikipedia.org/wiki/Chemical_graph_theory

    Chemical graph theory is the topology branch of mathematical chemistry which applies graph theory to mathematical modelling of chemical phenomena. [1] The pioneers of chemical graph theory are Alexandru Balaban, Ante Graovac, Iván Gutman, Haruo Hosoya, Milan Randić and Nenad Trinajstić [2] (also Harry Wiener and others). In 1988, it was ...

  5. Titration curve - Wikipedia

    en.wikipedia.org/wiki/Titration_curve

    A typical titration curve of a diprotic acid, oxalic acid, titrated with a strong base, sodium hydroxide.Both equivalence points are visible. Titrations are often recorded on graphs called titration curves, which generally contain the volume of the titrant as the independent variable and the pH of the solution as the dependent variable (because it changes depending on the composition of the ...

  6. Langmuir adsorption model - Wikipedia

    en.wikipedia.org/wiki/Langmuir_adsorption_model

    An example plot of the surface coverage θ A = P/(P + P 0) with respect to the partial pressure of the adsorbate. P 0 = 100 mTorr. The graph shows levelling off of the surface coverage at pressures higher than P 0. =, The chemical potential of an ideal gas is

  7. Pourbaix diagram - Wikipedia

    en.wikipedia.org/wiki/Pourbaix_diagram

    Pourbaix diagram of iron. [1] The Y axis corresponds to voltage potential. In electrochemistry, and more generally in solution chemistry, a Pourbaix diagram, also known as a potential/pH diagram, E H –pH diagram or a pE/pH diagram, is a plot of possible thermodynamically stable phases (i.e., at chemical equilibrium) of an aqueous electrochemical system.

  8. Stiff diagram - Wikipedia

    en.wikipedia.org/wiki/Stiff_diagram

    A Stiff diagram, or Stiff pattern, is a graphical representation of chemical analyses, first developed by H.A. Stiff in 1951.It is widely used by hydrogeologists and geochemists to display the major ion composition of a water sample.

  9. Predominance diagram - Wikipedia

    en.wikipedia.org/wiki/Predominance_diagram

    The three lines on this diagram meet at that point. Green line Chromate and hydrogen chromate have equal concentrations. Setting [CrO 2− 4] equal to [HCrO − 4] in eq. 1, [H +] = ⁠ 1 / K 1 ⁠, or pH = log K 1. This relationship is independent of pCr, so it requires a vertical line to be drawn on the predominance diagram. Red line

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