Technical data

The effects of acids and lyes on natural and commercialindicators

Article no: P7157400

Principle

Indicators are dyes that indicate by a color change the presence of acids. Many of these indicators are dyes from naturally occurring fruits and vegetables. There are in addition to these naturally occurring technical manufactured dyes that can serve as indicators such as phenolphthalein. In this experiment students examine the effect of acids and alkalis on natural and industrially produced indicators. The natural and technical manufactured indicators are compared and determined which indicators are most suitable for acid detection.

Learning objectives

Effcts of pH indicators

Benefits

Easy teaching and efficient learning by using interactive experimentation PHYWE-Software
Experiment is part of a complete solution set with experiments for the topic acids, alkalis and salts matched with international curriculum: all topics are covered

Scope of delivery

Wash bottle, 250 ml, plastic	33930-00	1
Test tube rack, wood, for 6 tubes d= 22mm	MAU-20042200	1
Protecting glasses, clear glass	39316-00	1
Test tube brush w. wool tip,d20mm	38762-00	1
Laboratory pen, waterproof, black	38711-00	1
Test tube, laboratory glass, various lengths, 100 pcs.	37658-10	1
Pipette with rubber bulb	64701-00	6
Potassium hydroxide pellets,500 g	30103-50	1
Litmus, powder 25 g	31517-04	1
Sodium hydroxide, pellets, 500 g	30157-50	1
Hydrochloric acid 37 %, 1000 ml	30214-70	1
Acetic acid 99...100%, 500 ml	31301-50	1
Methyl orange soln., 0.1% 250 ml	31573-25	1
Phenolphthalein, 0,5% soution in ethanol, 100 ml	31715-10	1