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16 July, 22:58

In the reversible reaction in water solution nh3 + h2o ⇀↽ nh + 4 + oh -, what acts as a bronsted-lowry acid and what acts as a bronsted-lowry base? 1. oh-; h2o 2. h2o; oh - 3. h2o; nh + 4 4. oh-; nh + 4 5. nh3; h2o

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  1. 17 July, 02:38
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    The equation is:

    NH₃ + H₂O ↔ NH₄⁺ + OH⁻

    base acid conj. acid conj. base

    NH₃ is the proton acceptor so it considered as Bronsted-Lowry base and H₂O is proton donor so it considered as Bronsted-Lowry acid

    NH₃ when accepted H⁺ it converted into NH₄⁺ (conjugate acid) and H₂O when losing H⁺ it converted into OH⁻ (conjugate base)

    The question asks for acid and base

    1) OH⁻ base, H₂O acid

    2) H₂O acid, OH⁻ base

    3) H₂O acid, NH₄⁺ acid

    4) OH⁻ base, NH₄⁺ acid

    5) NH₃ base, H₂O acid

    so the correct answer is 2) because it is the only one containing acid then base
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