Multiple Choice
What is the balanced chemical equation for the reaction between aluminum sulfate and silver nitrate?
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3. Chemical Reactions
Balancing Chemical Equations
Multiple Choice
Which of the following is the correctly balanced chemical equation for the reaction: Ca3N2(s) + H2O(aq) → Ca(OH)2(aq) + NH3(g)?
A
Ca3N2(s) + 6 H2O(aq) → 3 Ca(OH)2(aq) + 2 NH3(g)
B
Ca3N2(s) + 6 H2O(aq) → 3 Ca(OH)2(aq) + 2 NH3(g)
C
Ca3N2(s) + 6 H2O(aq) → 3 Ca(OH)2(aq) + 2 NH3(g)
D
Ca3N2(s) + 6 H2O(aq) → 3 Ca(OH)2(aq) + 2 NH3(g)
Verified step by step guidance1
Identify the reactants and products in the chemical equation: Reactants are Ca3N2(s) and H2O(aq), and products are Ca(OH)2(aq) and NH3(g).
Write the unbalanced chemical equation: Ca3N2(s) + H2O(aq) → Ca(OH)2(aq) + NH3(g).
Balance the calcium (Ca) atoms: There are 3 Ca atoms in Ca3N2, so you need 3 Ca(OH)2 on the product side. This gives the partial equation: Ca3N2(s) + H2O(aq) → 3 Ca(OH)2(aq) + NH3(g).
Balance the nitrogen (N) atoms: There are 2 N atoms in Ca3N2, so you need 2 NH3 on the product side. This gives the partial equation: Ca3N2(s) + H2O(aq) → 3 Ca(OH)2(aq) + 2 NH3(g).
Balance the hydrogen (H) and oxygen (O) atoms: There are 6 H2O molecules needed to provide 6 OH groups for 3 Ca(OH)2 and 6 H atoms for 2 NH3. This results in the balanced equation: Ca3N2(s) + 6 H2O(aq) → 3 Ca(OH)2(aq) + 2 NH3(g).
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