Balance the following half-reaction under basic conditions. PO3− → PH3
Step 1: Write the half reaction.
PO3- PH3
Step 2: Add required number of H2O to balance O atoms.
PO3- PH3 + 3 H2O
Step 3: Add required number of H+ to balance H atoms.
9 H+ + PO3- PH3 + 3 H2O
Step 4: Since medium is basic add equal number of OH- as H+ to both sides
9 H+ + 9 OH- + PO3- PH3 + 3 H2O + 9 OH-
Step 5: Add OH- as H+ to form H2O
9 H2O+ PO3- PH3 + 3 H2O + 9 OH-
= 6 H2O+ PO3- PH3 + 9 OH-
Step 6: Finally balance the charges by adding or subtracting required number of electrons.
6 H2O+ 8 e- + PO3- PH3 + 9 OH-
Balance the following half-reaction under basic conditions. PO3− → PH3
When the following half reaction is balanced under basic conditions, what are the coefficients of the species shown? P + H2O PH3 + OH- In the above half reaction, the oxidation state of phosphorus changes from to .
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