Chemistry 9701 · AS & A Level · Atoms, molecules and stoichiometry

Atoms, molecules and stoichiometry — practice question

Structure and bonding help to account for many of the properties shown by substances.
(a)[5]

Copper, ice, silicon(IV) oxide, iodine and sodium chloride are all crystalline solids. Complete the table by giving: one type of bonding present in each crystalline solid, and the lattice structure of each crystalline solid.

(b(i))[1]

Name the strongest intermolecular force present in ice.

(b(ii))[3]

Draw a fully labelled diagram of two water molecules in ice, showing the force in (i) and how it is formed.

(c)

The graph shows how the temperature of a copper sample (melting point $1085\,^\circ\text{C}$) changes as it is cooled slowly from $1200\,^\circ\text{C}$.

(c(i))[2]

State the states of matter present at each labelled point on the graph: X, Y and Z.

(c(ii))[2]

State what happens to the particles' energy and movement in the copper during stage X.

(c(iii))[2]

Explain why the temperature remains constant at $T_1$ during stage Y.

Worked solution & mark scheme

This 15-mark question has a full step-by-step worked solution and mark scheme. One marking point: Copper: metallic bonding with giant metallic lattice

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