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Dyeing a flower

Dyeing a flower

We spray a transparent liquid on the petals of a flower and watch it turn purple. Let’s learn the chemical trick behind this phenomenon.



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Aqueous solution of ammonia, Phenolphthalein, pH adjustment, Acid, Neutral, Basic, Ammonia (NH3), Alkaline, The reaction, Lab work and titration, Used to treat an upset stomach

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Ethyne (acetylene) (C₂H₂)

The first member of the homologous series of alkyne hydrocarbons.


Alkanes are saturated hydrocarbons which can be organised into a homologous series.

D-glucose (dextrose) (C₆H₁₂O₆)

The primary source of energy for living cells.


One of the twenty protein-building amino acids.


One of the 20 amino acids that make up proteins.

Cellulose (C₆H₁₀O₅)n

The building material of the cell walls and fibres of plants.

Ethanol (ethyl alcohol) (C₂H₅OH)

The best known alcohol, important in the food industry.

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