Mg equals Mg2+ plus 2e-
Mg equals Mg2+ plus 2e-
Mg Mg2+ 2e
apex
All elements are assigned an oxidation number of zero. Ions have an oxidation number equal to their charge. Therefore oxygen goes from "0" to "-2" in the reaction and a decrease in oxidation number is reduction. Similarly, the magnesium has gone from zero (elemental) to +2 as an ion. This is an increase and hence oxidation. There are a number of other (simpler) ways of expressing redox but this covers all types of redox - even when oxygen is not involved.
O2+4e- 2O 2-
Mg equals mg2+ +2e-
Mg equals Mg2+ plus 2e-
2Mg + O2 --------> 2MgO
Mg equals Mg2+ plus 2e-
Magnesium is converted into Magnesium oxide. 2Mg + O2 -----> 2MgO
Balanced Equation: 2Mg(NO3)2 = 2MgO + 4NO2 + O2
The word equation is magnesium + oxygen(air) = magnesium oxide. The Balanced chemical eq'n is 2Mg(s) + O2(g) = 2MgO(s)
2Mg + O2 --------> 2MgO
Mg equals Mg2+ plus 2e-
Mg equals Mg2+ plus 2e-
Magnesium is converted into Magnesium oxide. 2Mg + O2 -----> 2MgO
2Mg + O2 --> 2MgO
2Mg + O2 → 2MgO CaO + H2O → Ca(OH)2
Balanced Equation: 2Mg(NO3)2 = 2MgO + 4NO2 + O2
O2 + 4e- 2I2-
The word equation is magnesium + oxygen(air) = magnesium oxide. The Balanced chemical eq'n is 2Mg(s) + O2(g) = 2MgO(s)
magnesium + oxygen gas ----D magnesium oxide
2Mg + O2 Yeilds 2MgO
O2+4e- 2O 2-