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CBSE Class 10 Answered

Why all acids turns blue litmus into red and methyl orange to red?
Asked by Janu5320 | 18 Jun, 2008, 03:41: PM
answered-by-expert Expert Answer

Litmus paper,methyl orange and phenophthalin are all essentially pH indicators.There colour depends on the pH of solution.`All acids have a pH less than 7 and thus turn blue litmus red and similarily methyl orange red.(Methyl orange becomes red below pH 7 and litmus turns red).Similarily phenophthalin changes it's colour to pink over a pH of  7 and so it does when we add a  basic solution to it.

Answered by | 21 Jun, 2008, 04:45: PM

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