Net Ionic Equations (Answer Key)

Solubility: 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) (NH4)2S(aq) BaO(aq) NaCO3(aq) Hg2SO4(s) Pb(ClO4)2(aq) SrF2(s) MgC2O4(s) Li3PO4(aq) AgI(s) Mn(OH)4(s) rule #1 rule #6 rule #1 rule #5 rule #1 rule #4 rule #7 rule #1 rule #3 rule #6 (NH4)2S(aq) HC7H6O2(aq) N2O5(l) Hg2SO4(s) HClO4(aq) SrF2(s) Rb2C2O4 (aq) H3PO4(aq) AgI(s) Sr(OH)2(aq) strong electrolyte -- soluble salt weak electrolyte -- weak acid non electrolyte -- molecular compound weak electrolyte -- insoluble salt strong electrolyte -- strong acid weak electrolyte -- insoluble salt strong electrolyte -- soluble salt weak electrolyte -- weak acid weak electrolyte -- insoluble salt strong electrolyte -- soluble salt Electrolytes: 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) Net ionic equations: potassium phosphate and mercury (I) acetate M.E. 2 K3PO4(aq) + 3 Hg2(C2H3O2)2(aq) Æ 6 KC2H3O2(aq) + (Hg2)3(PO4)2(s) I.E. 6 K+(aq) + 2 PO4-3(aq) + 3 Hg2+2(aq) + 6 C2H3O2-(aq) Æ 6 K+(aq) + 6 C2H3O2-(aq) + (Hg2)3(PO4)2(s) 6 K+(aq) + 2 PO4-3(aq) + 3 Hg2+2(aq) + 6 C2H3O2-(aq) Æ 6 K+(aq) + 6 C2H3O2-(aq) + (Hg2)3(PO4)2(s) N.I.E. 2 PO4-3(aq) + 3 Hg2+2(aq) Æ (Hg2)3(PO4)2(s) sodium sulfide with iron (III) nitrate M.E. 3 Na2S(aq) + 2 Fe(NO3)3(aq) Æ 6 NaNO3(aq) + Fe2S3(s) I.E. 6 Na+(aq) + 3 S-2(aq) + 2 Fe+3(aq) + 6 NO3-(aq) Æ 6 Na(aq) + 6 NO3-(aq) + Fe2S3(s) 6 Na+(aq) + 3 S-2(aq) + 2 Fe+3(aq) + 6 NO3-(aq) Æ 6 Na(aq) + 6 NO3-(aq) + Fe2S3(s) N.I.E. 3 S-2(aq) + 2 Fe+3(aq) Æ Fe2S3(s) oxalic acid and cesium hydroxide M.E. 2 CsOH (aq) + H2C2O4(aq) Æ Cs2C2O4 (aq) + 2 H2O(l) I.E. 2 Cs+(aq) + 2 OH-(aq) + H2C2O4 (aq) Æ 2 Cs+(aq) + C2O4-2(aq) + 2 H2O(l) (H2C2O4 is a weak electrolyte, so it does NOT break up) 2 Cs+(aq) + 2 OH-(aq) + H2C2O4(aq) Æ 2 Cs+(aq) + C2O4-2(aq) + 2 H2O(l) N.I.E. 2 OH-(aq) + H2C2O4 (aq) Æ C2O4-2(aq) + 2 H2O(l) mercury (I) perchlorate and lead (II) nitrate M.E. Hg2(ClO4)2(aq) + Pb(NO3)2(aq) Æ Hg2(NO3)2(aq) + Pb(ClO4)2(aq) I.E. Hg2+2(aq) + 2 ClO4-(aq) + Pb+2(aq) + 2 NO3-(aq) Æ Hg2+2(aq) + 2 NO3-(aq) + Pb+2(aq) + 2 ClO4- (aq) Hg2+2(aq) + 2 ClO4-(aq) + Pb+2(aq) + 2 NO3-(aq) Æ Hg2+2(aq) + 2 NO3-(aq) + Pb+2(aq) + 2 ClO4- (aq) N.I.E. NO REACTION (when everything cancels on both sides, there is no reaction) chromium (II) bromide with lithium oxalate M.E. CrBr2(aq) + Li2C2O4(aq) Æ 2 LiBr(aq) + CrC2O4(s) I.E. Cr+2(aq) + 2 Br-(aq) + 2 Li+(aq) + C2O4-2(aq) Æ 2 Li+(aq) + 2 Br-(aq) + CrC2O4(s) Cr+2(aq) + 2 Br-(aq) + 2 Li+(aq) + C2O4-2(aq) Æ 2 Li(aq) + 2 Br-(aq) + CrC2O4(s) N.I.E. Cr+2(aq) + C2O4-2(aq) Æ CrC2O4(s) sulfuric acid with rubidium hydroxide M.E. 2 RbOH (aq) + H2SO4 (aq) Æ Rb2SO4 (aq) + 2 H2O(l) I.E. 2 Rb+(aq) + 2 OH-(aq) + 2 H+ + SO4-2(aq) Æ 2 Rb+(aq) + SO4-2(aq) + 2 H2O(l) (H2SO4 is a strong acid) 2 Rb+(aq) + 2 OH-(aq) + 2 H+ + SO4-2(aq) Æ 2 Rb+(aq) + SO4-2(aq) + 2 H2O(l) N.I.E. OH-(aq) + H+(aq) Æ H2O(l) calcium hydroxide with periodic acid M.E. Ca(OH)2 (aq) + 2 HIO4(aq) Æ Ca(IO4)2 (aq) + 2 H2O(l) I.E. Ca+2(aq) + 2 OH-(aq) + 2 HIO4(aq) Æ Ca+2(aq) + 2 IO4-(aq) + 2 H2O(l) (HIO4 is a weak electrolyte, so it does NOT break up) Ca+2(aq) + 2 OH-(aq) + 2 HIO4(aq) Æ Ca+2(aq) + 2 IO4-(aq) + 2 H2O(l) N.I.E. OH-(aq) + HIO4(aq) Æ IO4-(aq) + H2O(l) (since the coefficient on each of the remaining pieces was a 2, they were all reduced to 1) cesium chromate with rubidium oxide M.E. Cs2CrO4(aq) + Rb2O(aq) Æ Cs2O (aq) + Rb2CrO4(aq) I.E. 2 Cs+(aq) + CrO4-2(aq) + 2 Rb+(aq) + O-2(aq) Æ 2 Cs+(aq) + O-2(aq) + 2 Rb+(aq) + CrO4-2 (aq) 2 Cs+(aq) + CrO4-2(aq) + 2 Rb+(aq) + O-2(aq) Æ 2 Cs+(aq) + O-2(aq) + 2 Rb+(aq) + CrO4-2 (aq) N.I.E. N.R. sodium fluoride with nickel (III) sulfate M.E. 6 NaF(aq) + Ni2(SO4)3(aq) Æ 3 Na2SO4(aq) + 2 NiF3(aq) I.E. 6 Na+(aq) + 6 F-(aq) + 2 Ni+3(aq) + 3 SO4-2(aq) Æ 6 Na+(aq) + 3 SO4-2(aq) + 2 Ni+3(aq) + 6 F-(aq) 6 Na+(aq) + 6 F-(aq) + 2 Ni+3(aq) + 3 SO4-2(aq) Æ 6 Na+(aq) + 3 SO4-2(aq) + 2 Ni+3(aq) + 6 F-(aq) N.I.E. N.R. antimony (V) carbonate reacts with sulfuric acid to form carbon dioxide, water, and antimony (V) sulfate Sb2(CO3)5 (s) + 5 H2SO4 (aq) Æ Sb2(SO4)5 (s) + 5 H2CO3(aq) M.E. Sb2(CO3)5 (s) + H2SO4 (aq) Æ Sb2(SO4)5 (s) + 5 H2O(l) + 5 CO2(g) I.E. Sb2(CO3)5 (s) + 2 H+ + SO4-2(aq) Æ Sb2(SO4)5 (s) + 5 H2O(l) + 5 CO2(g) N.I.E. Sb2(CO3)5 (s) + 2 H+ + SO4-2(aq) Æ Sb2(SO4)5 (s) + 5 H2O(l) + 5 CO2(g) (nothing cancels, so I.E. and N.I.E. are the same) lithium acetate with copper (II) nitrate M.E. 2 LiC2H3O2(aq) + Cu(NO3)2(aq) Æ 2 LiNO3(aq) + Cu(C2H3O2)2(aq) I.E. 2 Li+(aq) + 2 C2H3O2-(aq) + Cu+2(aq) + 2 NO3-(aq) Æ 2 Li+(aq) + 2 NO3-(aq) + Cu+2(aq) + 2 C2H3O2- (aq) 2 Li+(aq) + 2 C2H3O2-(aq) + Cu+2(aq) + 2 NO3-(aq) Æ 2 Li+(aq) + 2 NO3-(aq) + Cu+2(aq) + 2 C2H3O2- (aq) N.I.E. NO REACTION