Chemistry 0620 · IGCSE · Electrolysis

Electrolysis — practice question

Silicon(IV) oxide and sodium chloride have dissimilar bonding types and structures.
(a)[2]

Name the type of bonding shown by silicon(IV) oxide, ........ sodium chloride.

(b)[1]

Name the type of structure found in silicon(IV) oxide.

(c(i))[2]

Silicon(IV) oxide has a high melting point. Explain why.

(c(ii))[1]

Silicon(IV) oxide is a poor conductor of electricity. Explain why.

(d)[3]

Explain why solid sodium chloride does not conduct electricity, whereas molten sodium chloride does conduct electricity.

(e(i))[2]

Name the products that form at the electrodes. product at the positive electrode (anode) ........ product at the negative electrode (cathode) ........

(e(ii))[1]

Write an ionic half-equation for the reaction at the negative electrode.

(f)[1]

Name the main product made at the positive electrode.

(g(i))[1]

Name the substance formed at the negative electrode.

(g(ii))[1]

Write an ionic half-equation for the reaction at the negative electrode.

(g(iii))[2]

Give a test for chlorine. test ........ result ........

Worked solution & mark scheme

This 17-mark question has a full step-by-step worked solution and mark scheme. One marking point: silicon(IV) oxide: covalent bonding

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