Ionic equations need to be balanced both in terms of mass and charge Fe3+ + Zn Fe2+ + Zn2+ This is not balanced in terms of charge as there is a total reactant charge of +3 and product charge of +4 2Fe3+ + Zn 2 Fe2+ + Zn2+ This is now balanced in terms of atoms and charges
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3.1.2.5 Balanced equations and associated calculations
Equations (full and ionic).
Students should be able to:
• write balanced equations for reactions studied
• balance equations for unfamiliar reactions when reactants and products are specified.