explain the effect of following indicators when come in contact with acid,base ,and neutral substance.
1 turmeric
2 China rose
3 phenophthalein
4 litmus paper or solution
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Turmeric as indicator
Turmeric as an indicator identifies basic solution only. Its colour changes to red when come in contact with basic solution. It colour does not change in acidic or neutral solution.
Litmus as indicator
Litmus is extracted from lichen plants. The solution of litmus in distilled water is mauver (purple) in colour. When added to acidic solution, it turns red and when added to basic solution, it turns blue.
The neutral litmus solution/ paper turns red, when added to some acidic solution.
The neutral litmus solution/paper turns blue, when added to some basic solution.
Litmus is available in the form of solution or in the form of strips of paper. Litmus paper is available in red and blue colours.
China Rose as indicator
The coloured solution extracted from the petals of China rose is light pink in colour. When it is used as an indicator, its colour changes to green in basic solution and dark pink colour (magenta) in acidic solutions. In neutral solution it colour does not change.
Phenolphthalein as indicator
Phenolphthalein solution is colourless When it comes in contact with basic solution, its colour changes to pink. But when the solution is acidic or neutral it remains colourless.
Turmeric as an indicator identifies basic solution only. Its colour changes to red when come in contact with basic solution. It colour does not change in acidic or neutral solution.
Litmus as indicator
Litmus is extracted from lichen plants. The solution of litmus in distilled water is mauver (purple) in colour. When added to acidic solution, it turns red and when added to basic solution, it turns blue.
The neutral litmus solution/ paper turns red, when added to some acidic solution.
The neutral litmus solution/paper turns blue, when added to some basic solution.
Litmus is available in the form of solution or in the form of strips of paper. Litmus paper is available in red and blue colours.
China Rose as indicator
The coloured solution extracted from the petals of China rose is light pink in colour. When it is used as an indicator, its colour changes to green in basic solution and dark pink colour (magenta) in acidic solutions. In neutral solution it colour does not change.
Phenolphthalein as indicator
Phenolphthalein solution is colourless When it comes in contact with basic solution, its colour changes to pink. But when the solution is acidic or neutral it remains colourless.
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