1. Regardless of physical state, the products of this reaction are Fe(OH)3 and NaNO3. The solubility rules predict that NaNO3 is soluble because all nitrates are soluble (rule 2). However, Fe(OH)3 is insoluble, because hydroxides are insoluble (rule 6) and Fe is not one of the cations which results in an exception. After dissociation, the ionic equation is as follows:
Fe3+(aq)+NO−3(aq)+Na+(aq)+3OH−(aq)→Fe(OH)3(s)+Na+(aq)+NO−3(aq)
Canceling out spectator ions leaves the net ionic equation:
Fe3+(aq)+OH−(aq)→Fe(OH)3(s)