Question

6 mol of a solution A+n requires 2 mol of \mathrm{Cr}_{2} \mathrm{O}_{7}^{-2}Cr2​O7−2​ ions for the oxidation of A+n  to  A O_{3}^{-}AO3−​ in acidic medium.  The value of n is  ​

Answer 1

QUESTION :

6 mol of a solution A+n requires 2 mol of $\mathrm{Cr}_{2}$ $\mathrm{O}_{7}^{-2}Cr2O7-2$ ions for the oxidation of A+n  to $A O_{3}^{-}AO3-$ in acidic medium.  The value of n is  ?

Answer :

An+≡Cr2O2−7(Cr2O2−7→2Cr3+)(n=6)

'n'factor=(5−n) 'n' factor =6

Eq≡Eq

moles×n-factor≡ moles × n-factor

6×(5−n)≡2×6

n≡3