Spectrophotometric Analysis of Equilibrium

Flashcards for key vocabulary related to the spectrophotometric analysis experiment focusing on equilibrium and concentration measurement.

Spectrophotometer

An instrument used to measure the absorbance of solutions at specific wavelengths.

Calibration Curve

A graphical method used to determine the concentration of a substance in a solution by relating absorbance to concentration.

Beer's Law

A relationship that relates the absorbance of a substance to its concentration, expressed as A = εbc.

Equilibrium Constant (Kc)

A value that expresses the ratio of the concentration of products to reactants at equilibrium in a chemical reaction.

Absorbance

A measure of the amount of light absorbed by a solution, directly proportional to its concentration.

Cuvette

A small, transparent container used to hold liquid samples for spectrophotometric measurements.

NaSCN

Sodium thiocyanate, a compound used in the experiment to react and form a colored complex with iron ions.

Fe (NO3)3

Ferric nitrate, used as a source of ferric ions in the equilibrium study.

Complex Ion

A structure consisting of a central metal ion bonded to one or more molecules or ions.

Full Spectrum Mode

A setting on the spectrophotometer used to collect absorbance data across a broad range of wavelengths.

Molarity (M)

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

Thiocyanatoiron (III) complex

Fe(SCN)²⁺, the colored complex formed during the reaction between iron(III) ions and thiocyanate ions.