Plant Acid-base Indicator is a photograph by Andrew Lambert Photography which was uploaded on May 13th, 2013.
Plant Acid-base Indicator
Plant acid-base indicator. Red cabbage (lower centre) contains a natural acid-base indicator and shows a range of pH by the colour changes seen. pH... more
Title
Plant Acid-base Indicator
Artist
Andrew Lambert Photography
Medium
Photograph
Description
Plant acid-base indicator. Red cabbage (lower centre) contains a natural acid-base indicator and shows a range of pH by the colour changes seen. pH is the measure of the amount of hydrogen ions in a solution, and is used to measure its alkalinity or acidity. Bases form alkaline solutions. The colour range here shows pH, from left to right 1, 4, 7, 10, 13. Acids have a pH less than 7. Alkalis have a pH greater than 7. Neutral solutions are pH 7. Each step of the pH scale marks a ten-fold change in acidity/alkalinity. The chemical in red cabbage that changes colour is an anthocyanin. The loss or gain of hydrogen ions changes its colour.
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May 13th, 2013
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