How to find n factor of SO2 ?

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Solution

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The n factor can be calculated by-
1) In acids- The number of ionisable hydrogen () atoms are equal to n factor.(Hydrogen that can be Inoised when in aqueous medium)
2) In bases- The number of ionisable hydroxyl ions (are equal to n factor.
3) In complex compounds- check for total charge on metal.

4) In reactions- The number of electrons involve

For compound SO2. We generally observed that when SO3 changes to SO2

there is change in oxidation state from +6 to +4. It involves 2 electrons. Hence n factor is 2.
In NaHCO3, there is only one ionisable hydrogen so n is 1

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How to determine n factor of compounds like SO2 AND SO3??

n

S O_{2}

F e S_{2} + O_{2} ⟶ F e_{2} O_{3} + S O_{2}

{K M n O}_{4} + {C u}_{2} S ⟶ {M n}^{2 +} + {C u}^{2 +} + {S O}_{2}

{C u}_{2} S

n

H_{2} S

S O_{2}

n

F e S_{2} \to F e_{2} O_{3} + S O_{2}

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