Why all acids turns blue litmus into red and methyl orange to red?

Asked by Janu5320 | 18th Jun, 2008, 03:41: PM

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  | 21st Jun, 2008, 04:45: PM

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