Why common indicators cannot determine pH value of a solution?
- Common indicators, such as litmus; methyl orange and phenolphthalein can easily tell, us whether a solution is acidic or alkaline, but they cannot easily tell how much a given acidic solution is stronger than another acidic solution.
- It means they cannot really tell us the pH value of different acidic or alkaline solutions.
- In case of litmus, we cannot tell about pH values of 5, 6 and 7. Similarly, in case of methyl orange pH values between 3 and 8 will not be very accurate.
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