Chemistry
A solution of caustic soda (NaOH) in water or when fused, conducts an electric current. What is the similarity in these two cases?
Related Questions
(a) Among Zn and Cu, which would occur more readily in nature as metal and which as ion?
(b) Why cannot we store AgNO3 solution in copper vessels?
(c) Out of Cu and Ag, which is more active?
(a) How would you change a metal like Cu into it's ions?
(b) How would you change Cu2+ ions to Cu?
During electrolysis of an aqueous solution of sulphuric acid between platinum electrodes, two types of anions migrate towards the anode but only one of them is discharged.
(a) Name the two anions.
(b) Name the main product of the discharge of anion at the anode and write the anode reaction.
(c) Name the product at the cathode and write the reaction.
(d) Do you notice any change in colour? State why?
(e) Why this electrolysis is considered as an example of catalysis?
Copper sulphate solution is electrolysed using a platinum cathode and carbon anode. Study the diagram given below and answer the following questions:
(a) Give the names of the electrodes A and B.
(b) Which electrode is the oxidising electrode?