Technical data

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

Article no: P7510800

Principle

During this experiment, the students have to determine the unknown concentration of an ammonia solution (solution to be analysed) with the aid of a suitable indicator (here: methyl orange). For this purpose, a known volume of the base is titrated with a volume of a hydrochloric acid 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 base

Benefits

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

Scope of delivery

Burette with straight stopcock, 25 ml Graduation 0.1 ml	47153-01	1
Pipette with rubber bulb	64701-00	1
Erlenmeyer flasks, Boro, wide neck, various sizes	46151-00	1
Funnel, diameter = 40 mm, plastic (PP)	36888-00	1
Graduated pipette, 5 ml : 0,1	36599-00	1
Protecting glasses, clear glass	39316-00	1
Pipettor,bulb,3 valves,100ml max.	47127-02	1
Burette clamp, roller mount.,1pl.	37720-01	1
Support base, variable	02001-00	1
Stand rods, stainless steel, various sizes	02059-00	1
Wash bottle, 250 ml, plastic	33930-00	1
Laboratory pen, waterproof, black	38711-00	1
Ammonia solution, 25%, 250 ml	30933-25	1
Methyl orange soln., 0.1% 250 ml	31573-25	1
Water, distilled 5 l	31246-81	1
Hydrochloric acid 37 %, 1000 ml	30214-70	1
Beaker, 50 ml, plastic (PP)	36080-00	2