Colorimetric Determination of Bromophenol Blue

These flashcards cover the key vocabularies and concepts related to the colorimetric determination of Bromophenol Blue and the principles of concentration measurements.

Parts per Million (ppm)

A unit convenient for expressing very small concentrations, where 1 ppm equals 1 part solute for every million parts solution.

Molarity

A measure of concentration defined as the number of moles of solute per liter of solution.

Dilution

The process of lowering the concentration of a solution by adding more solvent.

Beer’s Law

A law that relates the absorbance of a solution to the concentration of the absorbing species, path length, and molar absorptivity.

Absorbance

A measure of the quantity of light absorbed by a sample.

Molar absorptivity (ε)

A measure of how well a compound or ion absorbs light, expressed in L/(mol·cm).

Spectrophotometer

A device that measures the intensity of light into and out of a sample, displaying the absorbance.

Calibration Curve

A graphical representation showing the relationship between absorbance and concentration for a specific solute.

Equilibrium

The state in which the concentrations of reactants and products remain constant over time, often described in the context of chemical reactions.

Concentration of Cu²⁺

The amount of copper ions in solution, typically expressed in molarity (M) and determined using absorbance.