What are some common mistakes students make with stoichiometry of reactions between ions in solutions?
A failure to realize that BOTH mass and charge MUST be conserved in any chemical reaction.
Not only must mass be balanced in a chemical reaction, but charge must be balanced as well. If I start with 10 g, I must end with 10 g. Likewise, if the reactants have a certain charge, positive or negative, the products MUST have that same charge.
Lead nitrate + sodium chloride
As a net ionic equation:
The reactants were neutral (