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)

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Complete the equation for the reaction at anode

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

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State one explanation why concentration of sulfuric acid is increases?

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

State the ions present in dilute sodium chloride solution

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Construct the equation at the anode and cathode

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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