Respuesta:
9. Ca3PO4)2 Ca: +2 P: +5 O: -2
₊₂ ₊ₓ ₋₂
Ca3(PO4)2
+6 + 2x -16 = 0
2x = 16 - 6
2x = 10
x = 10/2 = +5
Explicación:
1. K2Cr2O7 K: +1 Cr: +6 O: -2
₊₁ ₊ₓ ₋₂
K2Cr2O7
+2 + 2X -14 = 0
2x = 14 - 2
2x = + 12
x = 12/2 = +6
2. Na3PO4 Na: +1 P: +5 O: -2
₊₁ ₊ₓ ₋₂
Na3PO4
+3 +x - 8 = 0
x = 8 - 3
x = +5
3. ZnSO4 Zn: +2 S: +6 O: -2
₊₂ ₊ₓ₋₂
ZnSO4
+2+x -8 = 0
x = 8 -2
x = +6
4. Na2S2O3 Na: +1 S: +2 O: -2
₊₁ ₊ₓ ₋₂
Na2S2O3
2 + 2x - 6 = 0
2x = +6 -2
2x = 4
x = 4/2 = 2
5. Li2CO3 Li: +2 C: +4 O: -2
₊₁ ₊ₓ ₋₂
Li2CO3
+2+x-6 = 0
x = +6 -2
x = +4
6. SrSO3 Sr: +2 S: +4 O: -2
₊₂ ₊ₓ₋₂
SrSO3
+2 +x -6 = 0
x = +6 -2
x = +4
7. Fe(OH)3 Fe: +3 O: -2 H: +1
₊₃ ₋₁
Fe(OH)3
+3 -3 = 0
8. Na3PO4 Na: +1 P: +5 O: -2
₊₁ ₊ₓ ₋₂
Na3PO4
+3 +x - 8 = 0
x = 8 - 3
x = +5
