1.

(ix) Zn +HNO_3 to Zn (NO_3)_2 +NH_(4)NO_3+H_2O .

Answer»

Solution :`Zn+HNO_3 to Zn(NO_3)_2 +NH_4NO_3+H_2O`
`Zn^(0) to ZN^(2+)+2e^(-)` ……………(1)
`N^(+5)+8e^(-) to N^(-3)` ……………(2)
Multiply Equation (1) by 4 to balance the electorns
`4Zn^(0) to 4Zn^(2+)+2e^(-)` ……………(3)
ADD equation (3) and (2)
`4Zn^(0)to 4Zn^(2+)+ cancel(8e^(1))`
`N5+cancel(8e^1)to N^(3-)`.
`4Zn^(0)+N^(5+)to 4Zn^(2+)+N^(2)` .
Overall equation .
`4Zn+10HNO_3 to 4Zn(NO_3)_2 +NH_4NO_3+H_2O`
Balance all the ATOMS except O and H
`4Zn +10HNO_(3)to 4Zn (NO_3)_2+ NH_4NO_3+H_2O`
Balance oxygen atom by adding `H_2O` on the side FALLING short of oxygen atom .
`4Zn+10HNO_3 to 4Zn(NO_3)_2 +NH_4NO_3+3H_2O` .


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