객관식
Which one of the following is the correct dissociation equation for Li2CO3 in water?
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6. Chemical Quantities & Aqueous Reactions
Molecular Equations
객관식
Which one of the following represents the molecular equation for the reaction of NH3 with HI?
A
NH3(aq) + HI(aq) → NH4I(aq)
B
NH3(aq) + H+(aq) → NH4+(aq)
C
NH4+(aq) + I−(aq) → NH3(aq) + HI(aq)
D
NH3(s) + HI(s) → NH4I(s)
검증된 단계별 안내1
Step 1: Understand the nature of the reactants. NH3 (ammonia) is a weak base and HI (hydroiodic acid) is a strong acid, both typically in aqueous solution (aq). When a base reacts with an acid, they form a salt through an acid-base neutralization reaction.
Step 2: Write the molecular equation by combining the reactants as they exist in solution. Since both NH3 and HI are aqueous, the molecular equation shows them as NH3(aq) and HI(aq).
Step 3: Recognize the product formed. NH3 accepts a proton (H+) from HI, forming the ammonium ion NH4+, and the iodide ion I− remains as the counter ion. Together, they form ammonium iodide, NH4I, which is soluble in water and thus written as (aq).
Step 4: Write the molecular equation by combining the reactants and the product: NH3(aq) + HI(aq) → NH4I(aq). This shows the overall reaction without breaking it into ions.
Step 5: Confirm that this molecular equation correctly represents the acid-base reaction in aqueous solution, distinguishing it from ionic or solid-state equations.
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