Question

Determine from the balanced chemical reaction if the derived mole ratio is correct or incorrect.

4Zn + 10HNO3 yields 4Zn(NO3)2 + N2O + 5H2O


(4 moles Zn / 5 moles H2O)

Answer 1

Answer:correct

Step-by-step explanation:

Answer 2

Balanced reaction:
`4Zn+10HNO_(3)\rightarrow 4Zn(NO_(3))_(2)+N_(2)O+5H_(2)O`

The mole ratio (4 moles Zn/5 moles
`H_(2)O`) is correct.

Step-by-step explanation:

Oxidation:
`Zn\rightarrow Zn(NO_(3))_(2)`

Balance N and O:
`Zn+2NO_(3)^(-)\rightarrow Zn(NO_(3))_(2)`

Balance charge:
`Zn+2NO_(3)^(-)-2e^(-)\rightarrow Zn(NO_(3))_(2)` ................(1)

Reduction:
`HNO_(3)\rightarrow N_(2)O`

Balance N:
`2HNO_(3)\rightarrow N_(2)O`

Balance H and O:
`2HNO_(3)+8H^(+)\rightarrow N_(2)O+5H_(2)O`

Balance charge:
`2HNO_(3)+8H^(+)+8e^(-)\rightarrow N_(2)O+5H_(2)O` ............. (2)

[
`4*`Equation-(1)] + [Equation-(2)]:

`4Zn+8NO_(3)^(-)+2HNO_(3)+8H^(+)\rightarrow 4Zn(NO_(3))_(2)+N_(2)O+5H_(2)O`

`\Rightarrow 4Zn+10HNO_(3)\rightarrow 4Zn(NO_(3))_(2)+N_(2)O+5H_(2)O`

So, balanced reaction:
`4Zn+10HNO_(3)\rightarrow 4Zn(NO_(3))_(2)+N_(2)O+5H_(2)O`

Hence the mole ratio (4 moles Zn/5 moles
`H_(2)O`) is correct.