For a 0.1 M solution of sodium carbonate, Na2CO3, which of the following is a correct mass balance equation? a. [Nat] + 2[H'] = 0.1 M b. [HCO3 ] + [CO3?] + [H"]=0.1 M C. [HCO31] + [CO32 ] + [H2CO3]=0.1 M d. [HCO31] + 2[CO32'] + [H2CO3] + [HT] = 0.1 M + Write a charge balance for a solution made by dissolving MgBr2 to give Mg2+, Br", MgBrt and MgOH", plus H and OH* from H2O a) 2[Mg+] + [H] + [MgBr*] + [MgOH'] = [Br] + [OH-] b) 2[Mg2+] + [HT] + [MgBr*] + [MgOHT] = [Br] c) [Mg+] + [HT] + [MgBr*] + [MgOH+] = [Br] + [OH'] d) 2[Mg2+] + [H+] = [MgBr*] + [MgOH'] + +