Textbook Question
Hydrazine (N2H4) and dinitrogen tetroxide (N2O4) form a self-igniting mixture that has been used as a rocket propellant. The reaction products are N2 and H2O. (a) Write a balanced chemical equation for this reaction.
3. Chemical Reactions
Balancing Chemical Equations
Multiple Choice
What is the balanced chemical equation for the reaction between aluminum sulfate and silver nitrate?
A
Al2(SO4)3(aq) + 6AgNO3(aq) → 3Ag2SO4(s) + 2Al(NO3)3(aq)
B
Al2(SO4)3(aq) + 3AgNO3(aq) → 3Ag2SO4(s) + Al(NO3)3(aq)
C
Al2(SO4)3(aq) + 4AgNO3(aq) → 4Ag2SO4(s) + Al(NO3)3(aq)
D
Al2(SO4)3(aq) + 2AgNO3(aq) → 2Ag2SO4(s) + Al(NO3)3(aq)
Verified step by step guidance1
Identify the reactants and products in the chemical reaction. The reactants are aluminum sulfate \((\text{Al}_2(\text{SO}_4)_3)\) and silver nitrate \((\text{AgNO}_3)\). The products are silver sulfate \((\text{Ag}_2\text{SO}_4)\) and aluminum nitrate \((\text{Al}(\text{NO}_3)_3)\).
Write the unbalanced chemical equation using the chemical formulas of the reactants and products: \(\text{Al}_2(\text{SO}_4)_3 + \text{AgNO}_3 \rightarrow \text{Ag}_2\text{SO}_4 + \text{Al}(\text{NO}_3)_3\).
Balance the equation by ensuring the number of atoms of each element is the same on both sides. Start by balancing the aluminum atoms. There are 2 aluminum atoms in \(\text{Al}_2(\text{SO}_4)_3\), so you need 2 \(\text{Al}(\text{NO}_3)_3\) on the product side.
Next, balance the sulfate \((\text{SO}_4)\) ions. There are 3 sulfate ions in \(\text{Al}_2(\text{SO}_4)_3\), so you need 3 \(\text{Ag}_2\text{SO}_4\) on the product side.
Finally, balance the silver \((\text{Ag})\) and nitrate \((\text{NO}_3)\) ions. You need 6 \(\text{AgNO}_3\) to provide 6 silver atoms for 3 \(\text{Ag}_2\text{SO}_4\) and 6 nitrate ions for 2 \(\text{Al}(\text{NO}_3)_3\). The balanced equation is \(\text{Al}_2(\text{SO}_4)_3 + 6\text{AgNO}_3 \rightarrow 3\text{Ag}_2\text{SO}_4 + 2\text{Al}(\text{NO}_3)_3\).
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