Carboxylic acids are potential electrolytes which exist in a
weakly dissociated condition in aqueous solutions. The location of
the dissociation equilibrium is quantitatively described by the Ka
or pKa value which can be determined with potentiometric
- Simplified implementation: all pre-settings already prepared
- Drop counter optimizes the experimental procedure
- Measure the alteration of the pH value during a titration of
approximately 0.1 molar aqueous solutions of formic acid, acetic
acid, monochloroacetic acid, propionic acid, butyric acid and
lactic acid with a 0.1 molar sodium hydroxide solution at constant
temperature using Cobra4 system.
- From the neutralisation curves read the pKa values of the acids
and compare them.
What you can learn about
- True and potential electrolytes
- Strong and weak acids
- Law of mass action
- Henderson-Hasselbalch equation
- Dissociation constant and pKa value
- Substituent effects
- Precision balance 620g/0.001g
Software included. Computer not provided.