Multiple Choice
Which of the following is the balanced complete ionic equation for the reaction between HI(aq) and NaOH(aq)?
6. Chemical Quantities & Aqueous Reactions
Complete Ionic Equations
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What is the balanced complete ionic equation for the reaction between HCl(aq) and K2CO3(aq) to form H2O(l), CO2(g), and KCl(aq)?
A
H+(aq) + Cl-(aq) + K2CO3(aq) → H2O(l) + CO2(g) + 2K+(aq) + 2Cl-(aq)
B
2HCl(aq) + K2CO3(aq) → H2O(l) + CO2(g) + 2KCl(aq)
C
2H+(aq) + 2Cl-(aq) + 2K+(aq) + CO3^2-(aq) → H2O(l) + CO2(g) + 2K+(aq) + 2Cl-(aq)
D
H+(aq) + Cl-(aq) + K+(aq) + CO3^2-(aq) → H2O(l) + CO2(g) + KCl(aq)
Verified step by step guidance1
Identify the reactants and products in the molecular equation: Reactants are HCl(aq) and K2CO3(aq), and products are H2O(l), CO2(g), and KCl(aq).
Write the balanced molecular equation: 2HCl(aq) + K2CO3(aq) → H2O(l) + CO2(g) + 2KCl(aq).
Break down all aqueous compounds into their ions to form the complete ionic equation: 2H+(aq) + 2Cl-(aq) + 2K+(aq) + CO3^2-(aq) → H2O(l) + CO2(g) + 2K+(aq) + 2Cl-(aq).
Identify and cancel out the spectator ions, which appear on both sides of the equation: In this case, 2K+(aq) and 2Cl-(aq) are spectator ions.
Write the net ionic equation by removing the spectator ions: 2H+(aq) + CO3^2-(aq) → H2O(l) + CO2(g).
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