An alkali is titrated against an acid with methyl orange as indicator, which of the following is a correct combination? Base Acid End point

Weak Strong Colourless to pink
Strong Strong Pinkish red to yellow
Weak Strong Yellow to pinkish red
Strong Strong Pink to colourless

Correct answer: Weak Strong Yellow to pinkish red

Solution

In a titration involving a weak base and a strong acid, methyl orange changes from yellow to pinkish red at the endpoint, indicating the transition from a basic to an acidic solution.

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