Technical data

Titration of a strong acid with a strong base with the aid of several indicators

Article no: P7510600

Principle

The aim of this experiment is to show and explain to the students how indicators can be used in analytical chemistry and to familiarise them with the fundamental principles of titration. Futhermore, a special focus is set on indicators and their various colour transition ranges.

During this experiment, the students have to determine the unknown concentration of hydrochloric acid (solution to be analysed) with the aid of several indicators. 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 a strong 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
Beaker, 50 ml, plastic (PP)	36080-00	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
Phenolphthalein, 0,5% soution in ethanol, 100 ml	31715-10	1
Methyl orange soln., 0.1% 250 ml	31573-25	1
Bromothymol blue, 0.1% sol. 50 ml	48004-05	1
Water, distilled 5 l	31246-81	1
Hydrochloric acid 37 %, 1000 ml	30214-70	1
Sodium hydroxide, pellets, 500 g	30157-50	1
Erlenmeyer flasks, Boro, wide neck, various sizes	46151-00	1