Chemistry 9701 · AS & A Level · Group 17

Group 17 — practice question

Chlorine, Cl$_2$, takes part in reactions with many elements and compounds, producing chlorides. Table 2.1 gives details of some chlorides of Period 3 elements.
(a)[3]

Fill in Table 2.1.

(b(i))[1]

State the type of redox reaction in which the same species is both oxidised and reduced.

(b(ii))[1]

Identify G.

(b(iii))[1]

Write an equation for how Cl$_2$ reacts with hot NaOH(aq).

(b(iv))[2]

Describe in full what is seen when AgNO$_3$(aq) is added to the aqueous solution of sodium chloride, and then dilute NH$_3$(aq) is added.

(c(i))[2]

PCl$_5$ is a simple molecule in the gas phase. It also exists in a solid form as two ions, PCl$_4^+$ and PCl$_6^-$. Complete Table 2.2 to identify the shapes of each of these species.

(c(ii))[2]

PCl$_5$ reacts with J to form H$_3$PO$_4$. Identify J and state the type of reaction.

(d(i))[4]

Complete Fig. 2.2 to show the mechanism for the reaction of Cl$_2$ with propene in reaction 1. Include charges, dipoles, lone pairs of electrons and curly arrows, as appropriate.

(d(ii))[1]

Identify the reagent and conditions for reaction 2.

(d(iii))[1]

Draw one repeat unit of the addition polymer formed from L.

Worked solution & mark scheme

This 18-mark question has a full step-by-step worked solution and mark scheme. One marking point: Correctly written formulas: $\mathrm{NaCl}$, $\mathrm{MgCl_2}$, $\mathrm{SiCl_4}$

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