Statement 1: When 100 ml of 0.1 M - N a 2 C O 3 solution is titrated with 0.2 M - HCl solution using methyl orange indicator, 100 ml of the acid solution is consumed at the end point. Statement 2:

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Statement 1: When 100 ml of 0.1 M - N a 2 ​ C O 3 ​ solution is titrated with 0.2 M - HCl solution using methyl orange indicator, 100 ml of the acid solution is consumed at the end point. Statement 2: In case of methyl orange indicator, the sudden change in colour is observed when N a 2 ​ C O 3 ​ is completely converted into NaHC O 3 ​ .

TestHub · Accepted Answer

I is correct: 100 ml x 0.1 M = 10 mmol N a 2 ​ C O 3 ​ ; methyl orange covers full neutralization (2 eq per mol), so 20 mmol HCl = 100 ml x 0.2 M - 100 ml is consumed. II is incorrect: the methyl orange end point comes at complete conversion to H 2 ​ C O 3 ​ ; the NaHC O 3 ​ stage is the phenolphthalein end point. Hence (c).

Chemistry - Redox Reactions Question with Solution | TestHub

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