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In the reaction CrO(5) + H(2)SO(4)rarr C...

In the reaction `CrO_(5) + H_(2)SO_(4)rarr Cr_(2)(sO_(4))_(3)+H_(2)O+O_(2)`, one mole of `CrO_(5)` will liberate how many molesof `O_(2)` :

A

`5//2`

B

`5//4`

C

`9//2`

D

`7//4`

Text Solution

Verified by Experts

The correct Answer is:
D
`4CrO_(5)+6H_(2)SO_(4)rarr2Cr_(2)(SO_(4))_(3)+6H_(2)O+7O_(2) " " `(Balanced reaction)
`:. ` 1 mole `CrO_(5)` produces 7/4 moles of `O_(2)`.
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In a balanced redox reaction net gain of electron (s) is equal to net loss of electrons (s). n_("factor") is a reaction specific parameter and for intermolecular redox reaction n-factor of oxidising reducing agent is the no. of moles of electron gained /lost by one mole of compound. Consider the following reaction: CrO_(5)+H_(2)SO_(4) to Cr_(2)(SO_(4))_(3)+H_(2)O+O_(2) One mole of CrO_(5) will liberate how many moles of O_(2) ?

In the reaction, 2FeSO_(4) +H_(2)SO_(4)+H_(2)O_(2)rarr Fe_(2)(SO_(4))_(3)+2H_(2)O The oxidising agent is

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Na_(2)CrO_(4)+HCl to H_(2)Cr_(2)O_(7)+Na_(2)SO_(4)

In the reaction, Cr_(2)O_(7)^(2-)+H_(2)O to 2CrO_(4)^(2-)+2H^(+) Cr undergoes

In the reaction : XCrCl_(3) + YH_(2)O_(2) rarr ZNaOH rarr Na_(2)CrO_(4) + NaCl + H_(2)O The values of X, Y and Z are respectively :

Can the reaction, Cr_(2)O_(7)^(2-) + H_(2)O rarr 2CrO_(4)^(2-) + 2H^(+) be regarded as a redox reaction ?

Potassium dichromate (K_(2)Cr_(2)O_(7)) is an orange coloured compound , very frequently used in laboratory as an oxidising agent as well as in a redox titration. It is generally prepared from chromite (FeCr_(2)O_(4)) ore according to the following reactions: (1) Fusion of chromite ore with sodium carbonate in excess of air. FeCr_(2)O_(4) + Na_(2)CO_(3) + O_(2) rarr Na_(2)CrO_(4)+Fe_(2)O_(3) +CO_(2) (2) Acidifing filtered sodium chromate solution with sulphuric acid. Na_(2)CrO_(4) + H_(2)SO_(4) rarr Na_(2)Cr_(2)O_(7) + Na_(2)SO_(4) + H_(2)O (3) Treating sodium dichormate with potassium choride . Na_(2)Cr_(2)O_(7) + KCl rarr K_(2)Cr_(2)O_(7) + NaCl If the number of moles of reactant available for reaction are : [FeCr_(2)O_(4)=0.25 "moles" , O_(2)=0.35 "moles", Na_(2)CO_(3)=0.60 "moles", H_(2)SO_(4)=0.2 "moles", KCl=0.4 "moles"] , then the maximum number of moles of K_(2)Cr_(2)O_(7) , that can be produced is :

RESONANCE-EQUIVALENT CONCEPT & TITRATIONS-Part -IV
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