PH3
(1 x bilok P) + (3 x (+1) = 0
Bilok P = -3
Na2S2O3
(2 x (+1) ) + (2 x bilok S) + (3 x (-2) ) = 0
(2 x bilok S) = 6 -2
Bilok S = 4: 2 = +2
Cr2O7 2-
(2 x Cr ) + (7 x -2 ) = -2
2 Cr = -2 + 14
Cr = 12 : 2 = +6
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PH3
(1 x bilok P) + (3 x (+1) = 0
Bilok P = -3
Na2S2O3
(2 x (+1) ) + (2 x bilok S) + (3 x (-2) ) = 0
(2 x bilok S) = 6 -2
Bilok S = 4: 2 = +2
Cr2O7 2-
(2 x Cr ) + (7 x -2 ) = -2
2 Cr = -2 + 14
Cr = 12 : 2 = +6