on adding phenophathalene to sodium hydroxide
Answers
Phenolphthalein remains colourless in neutral or acidic solution but turns out magenta or pink in basic solutions. When it is added to NaOH, the solution has the colour of pink since sodium hydroxide is a strong base..
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On adding phenophthalein to sodium hydroxide
Explanation:
Chemical nature
Every chemical substance has certain nature either it is :
- Acidic
- Basic
- neutral
The nature can be tested by use of :
pH scale
pH paper
Indicators
Indicators
They are the certain substances that bring about change in their colour or smell when some substance is added to it ,
The indicators are :
Natural : like litmus etc
Artificial : like phenolpthalein , methyl orange etc
The effect of acid , base and neutral substance on indicators :
Acids : turn phenolpthalein colourless
Bases : turn phenolpthalein pink
Neutral : no effect