Edexcel A-Level Chemistry A2 16.8 Write Cell Diagrams Using the Conventional Representation of Half Cells Questions

Read the diagram from half-cell to half-cell: place solids and ions in the right order, use Pt when needed and translate notation into half-equations.

Exam points

Write cell diagrams with correct species order, single lines and double salt-bridge lines.
Choose Pt in notation when no conducting solid appears in an ion-only redox half-cell.
Derive oxidation, reduction and overall equations from conventional cell notation.

[Maximum number: 1]

An electrochemical cell is made from the electrode systems shown by these half-equations.

\begin{aligned} \mathrm{Ag}^{+}(\mathrm{aq})+\mathrm{e}^{-} & \rightleftharpoons \mathrm{Ag}(\mathrm{~s}) & E^{\ominus}=+0.80 \mathrm{~V} \\ \mathrm{VO}_{2}^{+}(\mathrm{aq})+2 \mathrm{H}^{+}(\mathrm{aq})+\mathrm{e}^{-} & \rightleftharpoons \mathrm{VO}^{2+}(\mathrm{aq})+\mathrm{H}_{2} \mathrm{O}(\mathrm{l}) & E^{\ominus}=+1.00 \mathrm{~V} \end{aligned}

The apparatus used to measure the value for $E_{\text {cell }}^{\ominus}$ under standard conditions is shown.

Figure for Question Edexcel A-Level Chemistry A2 16.8 Write Cell Diagrams Using the Conventional Representation of Half Cells Questions question 1 — Edexcel A-Level Chemistry A2

Which is the cell diagram for this cell, using the conventional representation of half-cells?

$\mathrm{Ag}(\mathrm{s})\left|\mathrm{Ag}^{+}(\mathrm{aq})\right|\left|\left[\mathrm{VO}_{2}^{+}(\mathrm{aq})+2 \mathrm{H}^{+}(\mathrm{aq})\right]\right|\left[\mathrm{VO}^{2+}(\mathrm{aq})+\mathrm{H}_{2} \mathrm{O}(\mathrm{l})\right] \mid \mathrm{Pt}(\mathrm{s})$

$\mathrm{Ag}(\mathrm{s})\left|\mathrm{Ag}^{+}(\mathrm{aq})\right|\left|\left[\mathrm{VO}_{2}^{+}(\mathrm{aq})+2 \mathrm{H}^{+}(\mathrm{aq})\right],\left[\mathrm{VO}^{2+}(\mathrm{aq})+\mathrm{H}_{2} \mathrm{O}(\mathrm{l})\right]\right| \mathrm{Pt}(\mathrm{s})$

$\mathrm{Ag}(\mathrm{s})\left|\mathrm{Ag}^{+}(\mathrm{aq})\right|\left|\left[\mathrm{VO}^{2+}(\mathrm{aq})+\mathrm{H}_{2} \mathrm{O}(\mathrm{l})\right]\right|\left[\mathrm{VO}_{2}^{+}(\mathrm{aq})+2 \mathrm{H}^{+}(\mathrm{aq})\right] \mid \mathrm{Pt}(\mathrm{s})$

$\mathrm{Ag}(\mathrm{s})\left|\mathrm{Ag}^{+}(\mathrm{aq})\right|\left|\left[\mathrm{VO}^{2+}(\mathrm{aq})+\mathrm{H}_{2} \mathrm{O}(\mathrm{l})\right],\left[\mathrm{VO}_{2}^{+}(\mathrm{aq})+2 \mathrm{H}^{+}(\mathrm{aq})\right]\right| \mathrm{Pt}(\mathrm{s})$

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Edexcel A-Level Chemistry A2 16.8 Write Cell Diagrams Using the Conventional Representation of Half Cells Questions question 1