In the reaction HCl + NH3 → NH4+ + Cl−, identify the acid and base.

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Multiple Choice

In the reaction HCl + NH3 → NH4+ + Cl−, identify the acid and base.

Explanation:
The test is about the Bronsted-Lowry idea that an acid donates a proton and a base accepts a proton. In this reaction, HCl donates its proton to NH3. As a result, NH3 gains a proton to become NH4+, and HCl loses a proton to become Cl−. So HCl is the acid (the proton donor) and NH3 is the base (the proton acceptor). The resulting NH4+ is the conjugate acid of NH3, and Cl− is the conjugate base of HCl.

The test is about the Bronsted-Lowry idea that an acid donates a proton and a base accepts a proton. In this reaction, HCl donates its proton to NH3. As a result, NH3 gains a proton to become NH4+, and HCl loses a proton to become Cl−. So HCl is the acid (the proton donor) and NH3 is the base (the proton acceptor). The resulting NH4+ is the conjugate acid of NH3, and Cl− is the conjugate base of HCl.

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