Which of the following is NOT a redox reaction?

De sage

1 year ago

yh it's correct because redox reaction involves two reactants.
it's from the reactants you will know the one oxidizing and the one reducing.

because in redox reaction, reduction and oxidation occurs concurrently

EmB01

1 year ago

C. Ca(HCO3)2 → CaCO3 + H2O + CO2.

This equation represents a decomposition reaction, where calcium bicarbonate (Ca(HCO3)2) breaks down into calcium carbonate (CaCO3), water (H2O), and carbon dioxide (CO2). There is no transfer of electrons, so it's not a redox reaction.

The other options are all redox reactions:

A. 2HNO2 + 2HI → 2H2O + 2NO + I2 (oxidation of HI, reduction of HNO2)

B. Zn + H2SO4 → ZnSO4 + H2 (oxidation of Zn, reduction of H2SO4)

D. 4FeO + O2 → 2Fe2O3 (oxidation of FeO, reduction of O2)

E. 2Na + Cl2 → 2NaCl (oxidation of Na, reduction of Cl2)

malachisunday

2 years ago

C and E are not redox reactions.

Khadijahbintkhuwalid

1 year ago

A redox reaction is a reaction where there is a change in the oxidation states of the elements involved. Let's analyze each option:

A. 2HNO2 + 2HI → 2H2O + 2NO + I2

N in HNO2: +3
N in NO: +2 (Nitrogen is reduced)
I in HI: -1
I in I2: 0 (Iodine is oxidized)
This is a redox reaction.
B. Zn + H2SO4 → ZnSO4 + H2

Zn: 0
Zn in ZnSO4: +2 (Zinc is oxidized)
H in H2SO4: +1
H in H2: 0 (Hydrogen is reduced)
This is a redox reaction.
C. Ca(HCO3)2 → CaCO3 + H2O + CO2

Ca in Ca(HCO3)2: +2
Ca in CaCO3: +2 (Calcium's oxidation state does not change)
Let's examine Carbon:
C in (HCO3)-: +4
C in CO3(2-): +4
C in CO2: +4 (Carbon's oxidation state does not change)
The oxidation states of all elements remain the same.
This is NOT a redox reaction. It is a decomposition reaction.
D. 4FeO + O2 → 2Fe2O3

Fe in FeO: +2
Fe in Fe2O3: +3 (Iron is oxidized)
O in O2: 0
O in Fe2O3: -2 (Oxygen is reduced)
This is a redox reaction.
E. 2Na + Cl2 → 2NaCl

Na: 0
Na in NaCl: +1 (Sodium is oxidized)
Cl in Cl2: 0
Cl in NaCl: -1 (Chlorine is reduced)
This is a redox reaction.
Therefore, the reaction that is NOT a redox reaction is C. Ca(HCO3)2 → CaCO3 + H2O + CO2.

,,,,,,,,,,,,,,,,,,,,,,,,,Hi there!

maticonu

1 year ago

quick one to know redox rxn is to look for substance that stays on its own at the reactant side and also form a compound at the product side