Analytical Chemistry Methods and Measurements
This page covers fundamental analytical chemistry concepts including calibration methods, spectroscopy, and conductance measurements.
The pH of aqueous solutions follows the equation pH = -logH3O+, establishing the foundation for acid-base analysis.
Definition: Calibration dosing dosagepareˊtalonnage is a method using standard solutions of known concentrations to create a reference curve for determining unknown concentrations.
Example: For colored solutions, the Beer-Lambert law shows that absorbance A is directly proportional to concentration C through the equation A = KC, where K is the slope coefficient.
Vocabulary:
- Étalon: Standard reference solution
- Coefficient d'absorption molaire: Molar absorption coefficient
- Conductance: Measure of electrical conductivity in ionic solutions
Highlight: The Beer-Lambert law curve passes through the origin, indicating a direct proportional relationship between absorbance and concentration.
Quote: "PxV = nxRxT" - The ideal gas law equation showing the relationship between pressure, volume, temperature, and amount of gas.
The page also covers ionic solution analysis using Kohlrausch's law, where conductance σ relates to ionic concentration through σ = λX, with λ representing specific ionic conductivity.
Temperature conversions are addressed with the formula TK = °C + 273, essential for gas law calculations and other temperature-dependent measurements.
