Featured in PASCO’s College Chemistry Instructor Guide
College Instructor edition with 36 experiments covering introductory and general chemistry topics.
Ka of a Weak Acid
Use a pH sensor and drop counter to determine the equilibrium constant for the ionization of a weak acid to ascertain the identity of the acid.
Students determine the equilibrium constant for the ionization of a weak acid (Ka) to ascertain the identity of the acid.
Students gain experience conducting the following procedures:
- Determining the Ka of a weak acid by measuring the pH of a solution titrated halfway to the equivalence point.
- Using a pH sensor.
- Performing a titration.
Sensors / Equipment Used:
Allows students to measure Temperature, pH/ISE/ORP, Absolute Pressure & Voltage in one sensor. For use with PASPORT Interfaces.
Is a professional drop counter that allows students to capture detailed titration data. For use with PASPORT Interfaces.
Beaker, 100-mL - 2
Graduated cylinder, 100-mL
Magnetic stirrer and stir bar
0.20 M Sodium hydroxide (NaOH) - 75 mL
Unknown weak acid solution (use acetic acid) - 50 mL
Buffer solutions, pH 4 and pH 10 - 10 mL
The Associated Bundle:
Contains the probeware for completing experiments in the College Chemistry lab manual.