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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

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