Balance: H2C2O4(aq) +K2CrO4(aq) + HCl(aq) →CrCl3(aq) + KCl(aq) + H2O(l) +CO2(g)?
Just by oxidation method or ion-electron method.
Just by oxidation method or ion-electron method.
2 Answers
Well oxalic acid is oxidized to carbon dioxide....and chromate ion is reduced to chromic ion....
Explanation:
Charge and mass are balanced as required....
And so we take THREE of the former, and TWO of the latter to eliminate the electrons as virtual particles of convenience....
...and cancel away....
The which is balanced with respect to mass and charge, as is absolutely required....
WARNING! Long answer! The balanced equation is
Explanation:
The unbalanced equation is
Step 1. Identify the atoms that change oxidation number
Start by determining the oxidation numbers of every atom in the equation.
We see that the oxidation number of
The changes in oxidation number are:
Step 2. Equalize the changes in oxidation number
We need 3 atoms of
Step 3. Insert coefficients to get these numbers
Step 4. Balance
Step 5. Balance
Step 6. Balance
Add
Every formula now has a coefficient. The equation should be balanced.
Step 6. Check that all atoms are balanced.
The balanced equation is