Chemistry – Experimental techniques and chemical analysis - Chromatography | e-Consult
Experimental techniques and chemical analysis - Chromatography (1 questions)
Login to see all questions.
Click on a question to view the answer
To calculate the rate of formation, we use the equation Rf = (distance travelled by substance) / (distance travelled by solvent).
For a concentration of 0.1 mol/dm3:
Rf = 15 cm / 10 cm = 1.5 cm/s
For a concentration of 0.2 mol/dm3:
Rf = 30 cm / 20 cm = 1.5 cm/s
The rate of formation of the precipitate is 1.5 cm/s. The units for the rate of formation are cm/s (centimetres per second).