1. The problem statement, all variables and given/known data A student performs a single replacement reaction by dipping a strip of copper metal, Cu(s), into an aqueous solution of silver nitrate, AgN03(aq), to produce silver, Ag(s). Write the balanced equation. 2. Relevant equations 3. The attempt at a solution The answer has, 2AgN03(aq) + Cu(s) = 2Ag(s) + Cu(N03)2(aq). This only makes sense to me if it is copper II metal. Doesn't it have to specify? How else would I know? I know that there is some naming rule that says something about if there is nothing specified, then it is one or the other. But I have seen copper II specified before.