There are two types of iodine titrations (a) Iodometric & (b) Iodimetric, Iodometric method is indirect method of I_(2) estimation. Any oxidant which liberates I_(2) from KI solution, the liberated iodine is estimated by titrating it with Na_(2)S_(2)O_(3) solution as : I_(2)+2Na_(2)S_(2)O_(3)rarr2NaI+Na_(2)S_(4)O_(6) 100 mL of .x. M K_(2)Cr_(2)O_(7)solution is added to excess of KI solution in acidic medium. The liberated iodine required 50 mL of 0.1N Na_(2)S_(2)O_(3) solution. The value of x is

There are two types of iodine titrations (a) Iodometric & (b) Iodimetr

1.	There are two types of iodine titrations (a) Iodometric & (b) Iodimetric, Iodometric method is indirect method of I_(2) estimation. Any oxidant which liberates I_(2) from KI solution, the liberated iodine is estimated by titrating it with Na_(2)S_(2)O_(3) solution as : I_(2)+2Na_(2)S_(2)O_(3)rarr2NaI+Na_(2)S_(4)O_(6) 100 mL of .x. M K_(2)Cr_(2)O_(7)solution is added to excess of KI solution in acidic medium. The liberated iodine required 50 mL of 0.1N Na_(2)S_(2)O_(3) solution. The value of x is
Answer» `21.58%` `41.58%` `51.58%` `61.58%` Solution :eq. `CuSO_(4).5H_(2)O` = eq. `I_(2)` = eq. `Na_(2)S_(2)O_(3)` `PXX(3)/(249.5)xx1=(10)/(1000)xx0.5xx1=0.4158` implies % Purity = 41.58%