Степень окисления +4 сера проявляет в соединениях:
- H2SO4, H2S
- Nа2S, H2SO3
- H2SO3, SO2
📝 Detailed explanation
В SO2:O = −2
2 × (−2) = −4
Значит, S = +4
В H2SO3:
H = +1 -> (2 × +1 = +2)
O = −2 -> (3 × −2 = −6)
+2 + x − 6 = 0
x = +4
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