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 
phenolphthalein is not a suitable indicator. In the light of the above statements, choose the most appropriate answer from the options given below:
Text Solution
Verified by ExpertsB
Titration curve for strong acid and weak base initially a buffer of weak base and conjugate acid is :
Formed, thus 
falls slowly and after equivalence point, so the 
falls sharply so methyl arrange, having 
range of 3.2 to 4.4 will weak as indicator. So statement-I is correct.
Titration curve for weak acid and strong base 
Initially weak acid will form a buffer so 
increases slowly but after equivalence point. it rises sharply covering range of phenolphthalein so it will be suitable indicator so statement-II is false.
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