CaCl2 (aq) + Pb(NO3)2 (aq) a Ca+2 Cl-1 Pb+2 NO3-1 Ca (NO3)2 + PbCl2

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Presentation transcript:

CaCl2 (aq) + Pb(NO3)2 (aq) a Ca+2 Cl-1 Pb+2 NO3-1 Ca (NO3)2 + PbCl2 balanced molecular equation

Is this soluble and a strong electrolyte? CaCl2 (aq) + Pb(NO3)2 (aq) a Ca(NO3)2 + PbCl2 To write the ionic equation, any compound that is soluble and a strong electrolyte is ionized completely.

To know if something is soluble, you memorize the solubility rules. Strong electrolytes are all salts (soluble or not), strong acids (7) and strong bases (8). All other acids and bases are the weak electrolytes.

Is this soluble and a strong electrolyte? CaCl2 (aq) + Pb(NO3)2 (aq) a Ca(NO3)2 + PbCl2 Ca+2 + 2Cl-1 + Pb+2 + 2NO3-1 a Ca+2 + 2NO3-1 + PbCl2 not Cl2(g) Br I N Cl H O F

CaCl2 (aq) + Pb(NO3)2 (aq) a Ca(NO3)2 + PbCl2 + PbCl2(s) (Complete) Ionic equation

CaCl2 (aq) + Pb(NO3)2 (aq) a Ca(NO3)2 + PbCl2 a PbCl2(s) The net ionic equation is written simply by eliminating the spectator ions. Net ionic equation This reaction happens because a precipitate is formed.

Is this soluble and a strong electrolyte? molecular equation 2 HC2H3O2(aq) + Ca(OH)2 (aq) a H+ C2H3O2-1 Ca+2 OH-1 2 HOH + Ca(C2H3O2)2 ionic equation 2HC2H3O2 + Ca+2 + 2 OH- a 2 H2O + Ca+2 + 2C2H3O2- net ionic equation weak acid 2HC2H3O2 2 H2O + 2C2H3O2- HC2H3O2 D H+ + C2H3O2- + 2 OH- a 99% 1% This reaction happens because a nonelectrolyte is formed.

Is this soluble and a strong electrolyte? 2 HCl(aq) + Na2CO3(s) a H+CO3-2 H2CO3 + Na+Cl- + NaCl 2 2H+ + 2Cl- + Na2CO3(s) a H2O + CO2(g) + 2Na+ + 2Cl- It’s a weak acid and decomposes. 2H+ + Na2CO3(s) a H2O + CO2(g) + 2Na+ It’s a solid (not even in water) This reaction happens because a nonelectrolyte and a gas is formed.