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Physical Chemistry> x mmol of KIO 3 reacts completely with y ...

question mark

x mmol of KIO3 reacts completely with y mmol of KI to give I2 quantitatively. If z mmol of hypo are required for complete titration against this I2 then which relation is not correct ? a.z = 6x b.6y = 5z c.x = 5y d.x + y = 2zPlease explain in detail.............

RATHER YASIR , 5 Years ago

Grade 12th pass

4 Answers

Vikas TU

Last Activity: 5 Years ago

Hiii Rather

From my point of view the option D should be not the ans.

Option D should be x+y = z not x+y = 2z

If this option will correct then both c and d would be correct.

RATHER YASIR

Last Activity: 5 Years ago

Hii Vikas sir......................................

Please Sir...Can you explain in detail.................................................................................

MANTHAN RAO

Last Activity: 4 Years ago

Correct option : (c)

Explanation:

Here,

KIO3 + 5KI + 3H2SO4 → 3I2 + 3H2O + 3K2SO4

And

6Na2S2O3 + 3I2 → 3Na2S4O6 + 6NaI

From the above two chemical equation,

x = 1

, y = 5

and z =6

Now,

KIO3 + 6Na2S2O3 + 3H2SO4 → 3NaS4O6 + KI + 3H2O + 3Na2SO4

We have , Coa (Concentration of oxidising agent) x Voa (volume of oxidising agent)/ 1 = Cra x Vra (Reducing agent) / 6 = > x/1 = z/6 [v = 1 (assumed)] => z = 6x

Similarly, when we will have KI as the oxidising agent and Na2S2O3 as the reducing agent : y/5 = z/6

=> 6y = 5z Now, x + y = (1 + 5) = 6

= z so, option (c)

MANTHAN RAO

Last Activity: 4 Years ago

Correct option : (c)

Explanation:

Here,

KIO3 + 5KI + 3H2SO4 → 3I2 + 3H2O + 3K2SO4

And

6Na2S2O3 + 3I2 → 3Na2S4O6 + 6NaI

From the above two chemical equation,

x = 1

, y = 5

and z =6

Now,

KIO3 + 6Na2S2O3 + 3H2SO4 → 3NaS4O6 + KI + 3H2O + 3Na2SO4

We have , Coa (Concentration of oxidising agent) x Voa (volume of oxidising agent)/ 1 = Cra x Vra (Reducing agent) / 6 = > x/1 = z/6 [v = 1 (assumed)] => z = 6x

Similarly, when we will have KI as the oxidising agent and Na2S2O3 as the reducing agent : y/5 = z/6

=> 6y = 5z Now, x + y = (1 + 5) = 6

= z so, option (c) Option D should be x+y = z not x+y = 2z

IF YOUR OPTION IS CORRECT THAN THERE WILL BE TWO CORRECT ANSWER FOR THIS QUESTION THAT ARE (C) AND (D)

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