Given below are two statements.
Statement I: In the titration between strong acid and weak base methyl orange is suitable as an indicator.
Statement II: For titration of acetic acid with NaOH phenolphthalein is not a suitable indicator.
In the lightof the above statements, choose the most appropriate answer from the options given below:
Text Solution
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Titration curve for strong acid and weak base initially a buffer of weak base and conjugate acid is:
Formed, thus pH falls slowly and after equivalence point, so the pH falls sharply so methyl arrange, having pH range of 3.2 to 4.4 will weak as indicator. So Statement - I is correct.
Titration curve for weak acid and strong base (NaOH)
Initially weak acid will form a buffer so pH increases slowly but after equivalence point. it rises sharplycovering range of phenolphthalein so it will be suitable indicator so Statement –II is false.
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