Titration of a weak acid with a weak base with the aid of a suitable indicator

Principle

During this experiment, the students have to determine the unknown concentration of an acetic acid solution (solution to be analysed) with the aid of a suitable indicator (here: bromothymol blue). For this purpose, a known volume of the acid is titrated with a volume of an amomonia solution of a known concentration (standard solution) until the indicator changes colour. The used volume of the standard solution and its concentration are then used to calculate the concentration of the solution being analysed.

Learning objectives

Titration of a weak acid

Benefits

Experiment literature available for pupils and teachers: Minimum preparation time
Simple teaching and efficient learning by using the available interactive experiment literature

Device name

Article no.

Quantity

Burette with straight stopcock, 25 ml Graduation 0.1 ml

Article no. 47153-01

1

Pipette with rubber bulb

Article no. 64701-00

1

Erlenmeyer flasks, Boro, wide neck, various sizes | Volume: 100 ml

Article no. 46151-00

1