Question

NH4NC>3 is used in salt bridge because
(a) it forms a jelly like material with agar-agar.
(b) it is a weak electrolyte.
(c) it is a good conductor of electricity.
(d) the transport number of NH4+ and NO3– ions are almost equal.

Answer 1

Answer:d

Explanation:

Because both NH4+ and No3- have almost equal transport number ions.

Answer 2

Answer:

The answer is Option D : The transport number of $NH^{+} _{4}$ and $NO^{-} _{3}$ ions are almost equal.

Explanation:

Because the ionic velocity of the ammonium ion $(NH^{+}_{4} )$ and the nitrate ion $(NO^{-}_{3} )$ are the same, ammonium nitrate $(NH_{4} NO_{3} )$ is used in salt bridge.

• The salt bridge replaces the ions lost or created in the two half cells by supplying cations and anions. As a result, it does not interfere with the cell's neutrality, but rather helps to maintain it.

• For example, if an excess negative charge is formed as a result of extra ions, a significant amount of positive ions will migrate from the salt bridge to this half cell. This cancels out the surplus charge and renders the system electrically neutral.

Hence, $NH_{4}NO_{3}$ is used in salt bridge.