Absorbance The absorbance equation calculates the amount of energy absorbed by a molecule when the molecule is excited by a photon, and is promoted from the ground state (lowest energy level) to an excited state. This is demonstrated in an image below. |
Adjusted Retention time The Adjusted Retention Time calculator computes the time it takes for retained solute to travel through the length of the column. |
Analytical Chemistry Collection Analytical chemistry is the study of quantifying, analyzing and identifying matter by instruments and methods. |
Beer's Law The Beer-Lambert's law or simply Beer's law calculates the absorptivity of a sample based on the analyte concentration, path length and the molar absorptivity of the analyte. Beer's law is highly useful in spectrophotometry. There are several conditions for when the law is applicable, 1) monochromatic radiation is used, 2) when the chromophore concentrations is less than ~0.01M, 3) when the absorbing species is not participating in a concentration dependent equilibrium. |
Boiling Point Elevation The Solvent Boiling Point Elevation calculator computes the change in the boiling temperature (ΔTb) of a solvent based on the number of moles of solute (n), the mass of the solvent (M), the ebullioscopic constant (Kb) and the van't Hoff factor. |
Buoyancy Equation The buoyancy equation in chemistry, is used to correct the mass obtained from a measurement made on a balance, specifically when the mass obtained from the balance does not correspond to the object's standard mass density. In physics buoyancy is defined as the upward force on an object which is found in air, gas or liquid. |
Charge balance The charge balance equation is used to solve for a missing concentration of an ion. This neutrality equation is designed in a way where the molarity concentrations of cations along with their charge coefficients equal the molarity concentrations of anions and their charge coefficients. |
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Enthalpy The Enthalpy calculator compute the enthalpy energy based on the internal energy, pressure and volume. |
Equation for weak acid The equation for weak acid is used to calculated the unknown concentration of weak acid after dissociation in solution. This equation is paired with fraction of dissociation of an acid equation. |
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