A student standardizes a solution of `Na_(2)S_(2)O_(3)` by titrating it against a solution containing a known mass of `NaIO_(3)` that has been dissolved in an excess of a freshly prepared solution of KI in dilute HCI. Which of the following errors will lead to a value of the molarity of the thiosulphate solution that is higher than the true value?A. The student overshoots the endpoint of the titrationB. The `NaIO_(3)` is contamined with `NaCI`C. The `KI//HCI` solution is allowed to stand overnight before it is used in the titrationD. The sample of sodium thiosulphate pentahydrate used to make the `Na_(2)S_(2)O_(3)` solution had partially dehydrated on standing

A student standardizes a solution of `Na_(2)S_(2)O_(3)` by titrating i

1.	A student standardizes a solution of `Na_(2)S_(2)O_(3)` by titrating it against a solution containing a known mass of `NaIO_(3)` that has been dissolved in an excess of a freshly prepared solution of KI in dilute HCI. Which of the following errors will lead to a value of the molarity of the thiosulphate solution that is higher than the true value?A. The student overshoots the endpoint of the titrationB. The `NaIO_(3)` is contamined with `NaCI`C. The `KI//HCI` solution is allowed to stand overnight before it is used in the titrationD. The sample of sodium thiosulphate pentahydrate used to make the `Na_(2)S_(2)O_(3)` solution had partially dehydrated on standing
Answer» Correct Answer - B

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