Question

Assign oxidation numbers to each element on each side of the equation?

Answer 1

To assign oxidation numbers to each element on each side of the equation, we follow specific rules. In the given examples, we assign oxidation numbers to substances including sodium hydride, NO2, NO₂, AgNO3, CH2O, and NH3.

Step-by-step explanation:

To assign oxidation numbers to each element on each side of the equation, we can follow the oxidation number rules:

1. Atoms in their elemental state are assigned an oxidation number of 0.
2. Atoms in monatomic ions are assigned an oxidation number equal to their charge.
3. In compounds, fluorine is assigned an oxidation number of -1, oxygen is usually assigned an oxidation number of -2 (except in peroxide compounds and binary compounds with fluorine), and hydrogen is usually assigned an oxidation number of +1 (except when it exists as the hydride ion, H⁻).
4. In compounds, all other atoms are assigned an oxidation number so that the sum of the oxidation numbers on all the atoms in the species equals the charge on the species (which is zero if the species is neutral).

Now, let's assign oxidation numbers to the given substances:

12. Assign oxidation numbers:

a. NaH (sodium hydride): Na(+1), H(-1)

b. NO2: N(+4), O(-2)

c. NO₂: N(+4), O(-2)

d. AgNO3: Ag(+1), N(+5), O(-2)

13. Assign oxidation numbers:

a. CH2O: C(+2), H(+1), O(-2)

b. NH3: N(-3), H(+1)