Identify the substance oxidised and the sunstance reduced in each reaction. 1. CuO + H2---Cu+H2O, 2. ZnO+C---Zn+CO,3. MNO2+4HCL---MnCl2+2H2O+Cl2
Answers
● Some Oxidation numbers roles as
☆The element oxidation no is zero
☆The total sum of oxidation no of compound is equal zero
☆The total sum of oxidation no of ion is equal the charge of ion
☆The oxidation process in which the element oxidation no increases
☆The rexuction process in which the element oxidation no decreases
◇ CuO+ H2 => Cu + H2O
• CuO = zero
Cu = +2 , O = -2
• H2 = zero
• Cu
• H2O = zero
H = +1 , O= -2
■ Cu decrease the oxidation no so its reduced
■ H increases the oxidation no so its oxidized
The next equation
♤ Zn changes from +2 to zero , decreases so its reduced
♤ C changes from zero to +2 so its oxidized
The next equation
♧ Mn changes from +4 to +2 , its decreases, so its reduction
♧ Cl changes from -1 to zero , increases , so its oxidation
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