Problem: Consider the following acid-neutralization reactions involving the strong base NaOH(aq):HNO3(aq) + NaOH(aq) → NaNO3(aq) + H2O(l)HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)NH4+(aq) + NaOH(aq) → NH3(aq) + Na+(aq) + H2O(l)   ΔH = -4.12In the third equation NH4+ (aq) is acting as an acid. Based on the value of ΔH° for this reaction, do you think it is a strong or a weak acid? Explain.

FREE Expert Solution

strong acid → complete dissociation

weak acid → does not dissociate completely 


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Problem Details
Consider the following acid-neutralization reactions involving the strong base NaOH(aq):
HNO3(aq) + NaOH(aq) → NaNO3(aq) + H2O(l)
HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)
NH4+(aq) + NaOH(aq) → NH3(aq) + Na+(aq) + H2O(l)   ΔH = -4.12


In the third equation NH4+ (aq) is acting as an acid. Based on the value of ΔH° for this reaction, do you think it is a strong or a weak acid? Explain.

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