Technical data

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

Article no: P7510500

Principle

Acid-base titration combined with indicators is a method in analytical chemistry for the preliminary assessment of corresponding solutions. As a result, the first conclusions concerning the concentration of the analysed substance can be made

During this experiment, the students have to determine the unknown concentration of hydrochloric acid (solution to be analysed) with the aid of a suitable indicator (here: bromthymol blue). 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

Principle of a titration

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
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
Beaker, 50 ml, plastic (PP)	36080-00	2