Write the balanced molecular, complete ionic, and net ionic equations for the following
reactions in aqueous solution:
a. magnesium chloride reacts with potassium carbonate
b. sulfuric acid reacts with sodium hydroxide
Balanced molecular equation is this.
MgCl2(aq) + K2CO3(aq) ==> MgCO3(s) + 2KCl(aq)
Balanced full ionic equation is this.
Rules: If an insoluble material write as molecule. If a gas write as molecule. If a weak electrolyte write as molecule. Write all others as ions.
Mg^2+(aq) + 2Cl^-(aq) + 2K^+(aq) + CO3^2-(aq) ==> MgCO3(s) + 2K^+(aq) + 2Cl^-(aq)
Now cancel ions common to both sides. The result will be the net ionic equation.
2K^+ cancel; 2Cl^- cancel.
Mg^2+(aq) + CO3^2-(aq) ==> MgCO3(s)
Use these principles to do the second one.
The molecular equation is this.
H2SO4(aq) + 2NaOH(aq) ==> Na2SO4(aq) + 2H2O(l)
a. magnesium chloride reacts with potassium carbonate:
Balanced molecular equation:
MgCl2 + K2CO3 -> MgCO3 + 2KCl
Complete ionic equation:
2K+ + 2Cl- + Mg2+ + CO32- -> MgCO3 + 2K+ + 2Cl-
Net ionic equation:
Mg2+ + CO32- -> MgCO3
b. sulfuric acid reacts with sodium hydroxide:
Balanced molecular equation:
H2SO4 + 2NaOH -> Na2SO4 + 2H2O
Complete ionic equation:
2H+ + SO42- + 2Na+ + 2OH- -> Na2SO4 + 2H2O
Net ionic equation:
2H+ + 2OH- -> 2H2O
a. To write the balanced molecular equation between magnesium chloride (MgCl2) and potassium carbonate (K2CO3), we need to determine the chemical formula of the products formed from the reaction. The reaction between magnesium chloride and potassium carbonate can be represented as follows:
MgCl2 + K2CO3 --> MgCO3 + 2KCl
Next, we need to balance the equation by ensuring that the number of atoms of each element on both sides of the equation is the same. In this case, the equation is already balanced.
The complete ionic equation includes all the individual ions involved in the reaction. In this case, we have:
2Mg2+ + 2Cl- + 2K+ + CO3^2- --> MgCO3 + 2K+ + 2Cl-
Lastly, the net ionic equation removes the spectator ions, which are present on both sides of the equation and do not participate in the reaction. The net ionic equation for this reaction is:
2Mg2+ + CO3^2- --> MgCO3
b. The reaction between sulfuric acid (H2SO4) and sodium hydroxide (NaOH) can be represented as follows:
H2SO4 + 2NaOH --> Na2SO4 + 2H2O
Again, we need to balance the equation to ensure that the number of atoms of each element on both sides of the equation is the same. In this case, the equation is already balanced.
The complete ionic equation includes all the individual ions involved in the reaction. In this case, we have:
2H+ + SO4^2- + 2Na+ + 2OH- --> Na2SO4 + 2H2O
Lastly, the net ionic equation removes the spectator ions, which are present on both sides of the equation and do not participate in the reaction. The net ionic equation for this reaction is:
2H+ + 2OH- --> 2H2O