Chemistry
The diagram given below shows the electrolysis of acidified water using platinum electrode. Study the diagram and answer the following.
(a) Why dil. H2SO4 is used to acidify water instead of HCl or HNO3?
(b) Write the reaction involved in the ionisation of water and sulphuric acid and name the ions that move towards the cathode and anode.
(c) Write the overall reaction for the electrolysis of acidified water and at what ratio hydrogen and oxygen are liberated at the cathode and anode.
Related Questions
Identify the following.
(a) Process by which impurities from metals are removed electrolytically.
(b) A gas which does not conduct electricity in the liquid state but conducts electricity when dissolved in water.
(c) An organic compound which is used as a thermometric liquid.
(d) The type of reactions alkenes undergo.
(e) A salt which on reaction with excess of ammonium hydroxide solution gives a deep blue solution
Complete the following by choosing the correct answers from the bracket.
(a) An acid is a compound which when dissolved in water forms …………… (hydronium/hydroxide) ions as the positively charged ions.
(b) …………… (Al/Fe) metal is used in making alloys such as duralumin and magnalium.
(c) Cold and dilute nitric acid reacts with sulphur to form …………… (nitric oxide / nitrogen dioxide).
(d) Pure water consists almost entirely of …………… (ions/molecules/particles).
(e) One carbon atom in a hydrocarbon contain the root word as …………… (meth/eth).
Identify the anion present in each of the following compounds.
(a) Barium chloride on reacting with compound Z will form a white precipitate.
(b) Compound Y on reaction with sulphuric acid will liberate carbon dioxide along with sodium sulphate and water.
Identify the reactant and write the balanced equation for the following.
Calcium nitrate reacts with compound Q to give calcium hydroxide and sodium nitrate.