Jawabanmu

2014-05-16T20:10:26+07:00
a. AlO⁻₂
Al + (2 x -2) = -1
Al - 4 = -1
Al = -1 + 4
Al = +3

b. C₂O²⁻₄
2C + (4 x -2) = -2
2C - 8 = -2
2C = -2 + 8
2C = -6
C = -3

c, S₂O²⁻₈
2S + ( 8 x -2) = -2
2S - 16 = -2
2S = -2 + 16
2S = +14
S = +7

d. BrO⁻₃
Br + (3 x -2) = -1
Br - 6 = -1
Br = -1 + 6
Br = +5

e. AsO³⁻₄

As + (4 x -2) = -3
As - 8 = -3
As = -3 +8
As = +5