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SO₄ sendiri -2
Biloks S + 4.Biloks O = -2
Biloks S + 4.-2 = -2
Biloks S = -2+8 = +6
2.biloks Al + 3 biloks SO₄ = 0
2.biloks Al + 3.-2 = 0
2.biloks Al = 6
Biloks Al = 6/2 = +3
Fe(NO₃)₃
NO₃ sendiri -1
Biloks N + 3.Biloks O = -1
Biloks N + 3.-2 = -1
Biloks N = -1+6 = +5
biloks Fe + 3.biloks NO₃ = 0
biloks Fe + 3.-1 = 0
biloks Fe = +3
Ca₃(PO₄)₂
PO₄ sendiri -3
Biloks P + 4.Biloks O = -3
Biloks P + 4.-2 = -3
Biloks P = -3+8 = +5
3.biloks Ca + 2.biloks PO₄ = 0
3.biloks Ca + 2.-3 = 0
3.biloks Ca = 6
Biloks Ca = 6/3 = +2