Chemistry
(a) Which feature of ammonia molecule leads to the formation of the ammonium ion when ammonia dissolves in water?
(b) Name the other ion formed when ammonia dissolves in water.
(c) Give one test that can be used to detect the presence of the ion produced in (b).
Answer
(a) Ammonia molecule has a lone pair of electrons on it's nitrogen atom.
Due to this lone pair of electrons, in aqueous solutions it forms ammonium ion.
NH3 + H2O ⟶ NH4OH
NH4OH ⇌ NH4+ + OH-
(b) Hydroxyl ion [OH-].
(c) The red litmus paper turns blue due to the presence of hydroxyl ion in the solution.
Related Questions
Name a compound prepared by ammonia and is used as :
(a) Explosive
(b) Fertilizers
(c) Medicine
(d) Laboratory reagent
(a) Of the two gases, ammonia and hydrogen chloride, which is more dense? Name the method of collection of this gas.
(b) Give one example of a reaction between the above two gases which produces a solid compound.
(c) Write a balanced equation for a reaction in which ammonia is oxidized by:
(i) a metal oxide
(ii) a gas which is not oxygen.
Write the equation for the action of heat on:
(a) Ammonium chloride
(b) Ammonium nitrate
State whether each reaction is an example of thermal decomposition or thermal dissociation.