Question

1) Equivalent weight of NH3 in the change N2 ---› NH3 is ??

2) Equivalent weight of N2 in the change N2 ---› NH3 is ??

Answer 1

Hello !!
1)The equivalent weight of NH3 in change
N2→NH3 is : 28/6
2) Equivalent weight of N2 in change
N2→NH3 is : 17/3 .

Answer 2

Equivalent weight calculation for $NH_3$ and $N_2$.

• The formula to be used for calculation is as follows:

$Equivalent weight = \frac{Molecular weight}{Number of e- lost or gained per mole}$

1) Equivalent weight of $NH_3$.

The given reaction is:

$N_2\rightarrow NH_3$

The reaction denoting electrons lost/gained is as follows:

$N_2+6e^-\rightarrow 2N^{3-}$

As per the above equation, the number of electrons gained is 3.

Molecular weight of $NH_3$

= 1 (Atomic weight of N) + 3 (Atomic weight of H)

= 1 (14) + 3 (1)

= 14 + 3

= 17

∴ $Equivalent weight = \frac{Molecular weight}{Number of e- lost or gained per mole}$

$Equivalent weight = \frac{17}{3}$

2) Equivalent weight of $N_2$ .

The given reaction is:

$N_2\rightarrow NH_3$

The reaction denoting electrons lost/gained is as follows:

$N_2+6e^-\rightarrow 2N^{3-}$

As per the above equation, the number of electrons gained is 6.

Molecular weight of $N_2$ = 2 (atomic weight of N) = 2 (14) = 28

∴ $Equivalent weight = \frac{Molecular weight}{Number of e- lost or gained per mole}$

$Equivalent weight = \frac{28}{6}$

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