Oksidlanish darajasi
Javoblar ota-onalar va o‘qituvchilar uchun.
1
HClO₄ dagi xlorning oksidlanish darajasini hisoblang.
(+1) + x + 4·(–2) = 0, x = +7.
2
Ca₃(PO₄)₂ da fosforning oksidlanish darajasi?
3·(+2) + 2x + 8·(–2) = 0, x = +5.
3
Azotning N₂, NH₃, NO, NO₂, HNO₃ dagi darajalarini ketma-ket yozing.
0, –3, +2, +4, +5
4
Cr₂O₇²⁻ ionida xrom darajasi?
2x + 7·(–2) = –2, x = +6.
5
Nima uchun oksidlanish darajasi kasr bo‘lishi mumkin? Fe₃O₄ misolida tushuntiring.
3x + 4·(–2) = 0, x = +8/3; aslida Fe²⁺ va Fe³⁺ aralashmasi, o‘rtacha qiymat kasr.