Balancing Redox Equations (Leaving Cert Chemistry): Flashcards
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13 cards from this deck
Method for complex redox equations
Method for complex redox equations
Systematic approach based on oxidation numbers
Focus of systematic redox balancing method
Focus of systematic redox balancing method
Electron transfer
Step 1 of 5-step redox balancing method
Step 1 of 5-step redox balancing method
Assign oxidation numbers to all atoms
Step 2 of 5-step redox balancing method
Step 2 of 5-step redox balancing method
Identify which elements change oxidation number
Step 3 of 5-step redox balancing method
Step 3 of 5-step redox balancing method
Determine electrons lost and gained
Increase in oxidation number represents
Increase in oxidation number represents
Loss of electrons (oxidation)
Decrease in oxidation number represents
Decrease in oxidation number represents
Gain of electrons (reduction)
Step 4 of 5-step redox balancing method
Step 4 of 5-step redox balancing method
Work out ratio of oxidising agent to reducing agent
Key principle in redox electron balance
Key principle in redox electron balance
Electrons lost must equal electrons gained
Step 5 of 5-step redox balancing method
Step 5 of 5-step redox balancing method
Balance remaining items using inspection method
Atoms balanced last in redox equations
Atoms balanced last in redox equations
Oxygen and hydrogen atoms
Atom balance verification in redox equations
Atom balance verification in redox equations
Count atoms of each element on both sides (must be equal)
Charge balance verification in redox equations
Charge balance verification in redox equations
Calculate total charge on both sides (must be equal)