Technical data

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

Article no: P7511000

Principle

During this experiment, the students have to determine the unknown concentration of sulphuric acid (solution to be analysed) with the aid of a suitable indicator (here: phenolphthalein). For this purpose, a known volume of the acid is titrated with a volume of a sodium hydroxide 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 sulphuric acid

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 glass stopcock, 10 ml	47152-03	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
Graduated cylinders, plastic, various sizes	46287-01	1
Laboratory pen, waterproof, black	38711-00	1
Phenolphthalein, 0,5% soution in ethanol, 100 ml	31715-10	1
Water, distilled 5 l	31246-81	1
Sulphuric acid, 10%, tech.gr., 1000 ml	31828-70	1
Sodium hydroxide, pellets, 500 g	30157-50	1
Beaker, 50 ml, plastic (PP)	36080-00	2