enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Gas constant - Wikipedia

    en.wikipedia.org/wiki/Gas_constant

    The gas constant occurs in the ideal gas law: = = where P is the absolute pressure, V is the volume of gas, n is the amount of substance, m is the mass, and T is the thermodynamic temperature. R specific is the mass-specific gas constant. The gas constant is expressed in the same unit as molar heat.

  3. Titration - Wikipedia

    en.wikipedia.org/wiki/Titration

    A reagent, termed the titrant or titrator, [2] is prepared as a standard solution of known concentration and volume. The titrant reacts with a solution of analyte (which may also be termed the titrand [3]) to determine the analyte's concentration. The volume of titrant that reacted with the analyte is termed the titration volume.

  4. Standard solution - Wikipedia

    en.wikipedia.org/wiki/Standard_solution

    The ratio of peak areas between the internal standard and analyte is calculated to determine analyte concentration. [12] A common type of internal standard is an isotopically labeled analogue of the analyte, which incorporates one or more atoms of 2 H, 13 C, 15 N and 18 O into its structure. [13]

  5. Thermometric titration - Wikipedia

    en.wikipedia.org/wiki/Thermometric_titration

    Differences in the temperature between the titrant and the titrand; Evaporative losses from the surface of the rapidly mixed fluid; Heats of solution when the titrant solvent is mixed with the analyte solvent; Heat introduced by the mechanical action of stirring (minor influence); and; Heat produced by the thermistor itself (very minor influence).

  6. Analytical chemistry - Wikipedia

    en.wikipedia.org/wiki/Analytical_chemistry

    Titration is a family of techniques used to determine the concentration of an analyte. [8] Titrating accurately to either the half-equivalence point or the endpoint of a titration allows the chemist to determine the amount of moles used, which can then be used to determine a concentration or composition of the titrant.

  7. Van 't Hoff equation - Wikipedia

    en.wikipedia.org/wiki/Van_'t_Hoff_equation

    where ln denotes the natural logarithm, is the thermodynamic equilibrium constant, and R is the ideal gas constant.This equation is exact at any one temperature and all pressures, derived from the requirement that the Gibbs free energy of reaction be stationary in a state of chemical equilibrium.

  8. Cubic equations of state - Wikipedia

    en.wikipedia.org/wiki/Cubic_equations_of_state

    The van der Waals equation of state may be written as (+) =where is the absolute temperature, is the pressure, is the molar volume and is the universal gas constant.Note that = /, where is the volume, and = /, where is the number of moles, is the number of particles, and is the Avogadro constant.

  9. Coulometry - Wikipedia

    en.wikipedia.org/wiki/Coulometry

    The electrochemical generation of a titrant is much more sensitive and can be much more accurately controlled than the mechanical addition of titrant using a burette drive. For example, a constant current flow of 10 μA for 100 ms is easily generated and corresponds to about 10 micrograms of titrant.