How is china rose used as an indicator?
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Soak some petals of china rose in warm water for a couple of hours. The red-coloured solution is used as an indicator for detecting an acid or a base solution. It turns into magenta in acidic medium and green in basic medium. Hence, it is a natural indicator....
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China rose is used as a indicator by boiling it in water for half an hour . after that let it cool.
then it can be used as a indicator.
In acid it changes it colour in magenta red.
and in base it changes in greyish yellow.
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