For the reaction c5h5n(aq) + h2o(l) c5h5nh+(aq) + oh-(aq), which of the following is a conjugate acid-base pair?

a. c5h5n, c5h5nh+
b. c5h5nh+, oh-
c. h2o, oh-
d. c5h5n, h2o

b. ,

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

For the given chemical equation:

Here, is accepting a proton, thus it is considered as a base and after accepting a proton, it forms which is a conjugate acid.

And, is losing a proton, thus it is considered as an acid and after loosing a proton, it forms which is a conjugate base.

Hence, the correct answer is b. ,

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

the answer is barium and copper bromide