electrochemistry

The diagram below shows the electrolysis of dilute sulfuric acid. The ions present in the dilute acid are H⁺(aq) , OH^- (aq) , SO₄^2- (aq). In this electrolysis, the concentration of sulfuric acid increases.

Write the equation of reaction in negative electrode (cathode)

Complete the equation for the reaction at anode

4OH^- (aq) --> ...H₂O (l) + O₂ (g) + ...

State one explanation why concentration of sulfuric acid is increases?

The electrolysis of dilute sodium chloride solution was carried out with inert electrodes.

State the ions present in dilute sodium chloride solution

Construct the equation at the anode and cathode

What are the products at the electrodes when dilute sulfuric acid is electrolysed using inert electrodes

• anode: hydrogen , cathode: oxygen

• anode: oxygen, cathode: hydrogen

• anode: sulfur, cathode: oxygen

• anode: sulfur dioxide, cathode: hydrogen

Which describes the electrolysis of molten potassium bromide?

• product at anode is bromine, product at cathode is hydrogen

• product at anode is hydrogen, product at cathode is bromine

• product at anode is bromine, product at cathode is potassium

• product at anode is potassium, product at cathode is bromine

Which products are formed at the electrodes when a concentrated solution of sodium chloride is electrolysed

• cathode: hydrogen, anode: chlorine

• cathode: chlorine, anode: oxygen

• cathode: sodium, anode: chlorine

• cathode: sodium, anode: oxygen

What are the electrode products when molten silver iodide is electrolysed between inert electrodes?

• cathode: hydrogen, anode: iodine

• cathode: iodine, anode: silver

• cathode: silver, anode: iodine

• cathode: silver, anode: oxygen

Which products are formed at the anode and cathode when electricity is passed through molten lead (II) bromide

• anode: bromide ions, cathode: lead ions

• anode: bromide molecules, cathode: lead atoms

• anode: lead atoms, cathode: bromide molecules

• anode: lead ions, cathode: bromide ions