Nothing could be further from the truth: an infinite number of chemical reactions is possible, and neither you nor anyone else could possibly memorize them all. Students tend to think that this means they are supposed to “just know” what will happen when two substances are mixed. As you advance in chemistry, however, you will need to predict the results of mixing solutions of compounds, anticipate what kind of reaction (if any) will occur, and predict the identities of the products. So far, we have always indicated whether a reaction will occur when solutions are mixed and, if so, what products will form. Net ionic equation: 3Ag +(aq) + PO 4 3−(aq) → Ag 3PO 4(s) Write the overall chemical equation, the complete ionic equation, and the net ionic equation for the reaction of aqueous silver fluoride with aqueous sodium phosphate to give solid silver phosphate and a solution of sodium fluoride. The six NO 3 −(aq) ions and the six Na +(aq) ions that appear on both sides of the equation are spectator ions that can be canceled to give the net ionic equation: 3Ba 2+(aq) + 2PO 4 3−(aq) → Ba 3(PO 4) 2(s) To obtain the complete ionic equation, we write each soluble reactant and product in dissociated form: 3Ba 2+(aq) + 6NO 3 −(aq) + 6Na +(aq) + 2PO 4 3−(aq) → Ba 3(PO 4) 2(s) + 6Na +(aq) + 6NO 3 −(aq) This is the overall balanced chemical equation for the reaction, showing the reactants and products in their undissociated form. Write all the soluble reactants and products in their dissociated form to give the complete ionic equation then cancel species that appear on both sides of the complete ionic equation to give the net ionic equation.įrom the information given, we can write the unbalanced chemical equation for the reaction: Ba(NO 3) 2(aq) + Na 3PO 4(aq) → Ba 3(PO 4) 2(s) + NaNO 3(aq)īecause the product is Ba 3(PO 4) 2, which contains three Ba 2+ ions and two PO 4 3− ions per formula unit, we can balance the equation by inspection: 3Ba(NO 3) 2(aq) + 2Na 3PO 4(aq) → Ba 3(PO 4) 2(s) + 6NaNO 3(aq) Write and balance the overall chemical equation. Write the overall chemical equation, the complete ionic equation, and the net ionic equation for the reaction of aqueous barium nitrate with aqueous sodium phosphate to give solid barium phosphate and a solution of sodium nitrate.Īsked for: overall, complete ionic, and net ionic equations
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