cotlauviorel cotlauviorel 18-03-2014 Chemistry Answered Please help meNa2SO3+...=H2SO4CaSO3+...=H2SO4SO2+...=MgSO3Ca3PO4=PH3PO4+...=Ca(H2PO4)2P+...=Mg3P2SiO2+...=Mg2Si