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The table below gives the results of thr...

The table below gives the results of three titrations carried out with 0.200 M HCl to determine the molarity of a given NaOH solution using phenolphthalein as indicator. NaOH was taken in the burette and HCl was taken in a conical flask for the titrations

The actual molarity of the prepared NaOH solution was `"0.220 mol dm"^(-3)`. Which among the following could be the reason for the wrong value obtained in titration III?

A

Number of drops of phenolphthalein added to the titration flask was more in this titration

B

The concentration of HCl was wrongly used as 0.250 M for the calculation of M NaOH

C

A few drops of NaOH solution were spilled outside the titration flask during titration

D

A few drops of the neutralized solution from titration II were left behind in the flask

Text Solution

Verified by Experts

The correct Answer is:
C
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