Jawabanmu

2014-02-28T21:52:27+07:00
A) NaOH : Na = +1 O = -2 H = +1
c) MgH₂ : Mg = -2
d) HPO₄²⁻ : 
1 BO H + 1 BO P + 4 BO O = -2
1 + P -8 = -2
P = -2 -1 +8
P = +5
e) S₂O₃²⁻ :
2 BO S + 3 BO O = -2
2S -6 = -2
2S = -2 +6
2S = 4
S = +2

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