Below is 2 examples of questions that you could be asked. During the session, I will run through on the whiteboard, a good method of completing this style of question. _GaF3 + _Na3PO4 -----> _GaPO4 + _NaF ///// _CaBr2 + _Mg(NO3)2 -----> _Ca(NO3)2 + _MgBr2