Line notation, electrochemical cell

It is important to discuss cell notation and conventions. Instead of drawing a complete diagram to present electrochemical cells, it is convenient to specify a cell in line formula form or, as may be said, shorthand form. The Cu-Zn cell is thus presented as ... 

We now will introduce a handy line notation used to describe electrochemical cells. In this notation the anode components are listed on the left and the cathode components are listed on the right, separated by double vertical lines (indicating the salt bridge or porous disk). For example, the line notation for the cell described in Example 18.3(a) is... 

Because there are so many possible electrochemical cells, a shorthand notation for representing their specific chemistry has been devised. This cell notation lists the metals and ions involved in the reaction. A vertical line,, denotes a phase boundary, and a double line, H, represents the salt bridge. The anode is always written on the left, and the cathode on the right ... 

Electrochemical cells are written by juxtaposing the representations of their electrodes given above. In the adopted notation, a vertical dashed line means a junction between two miscible liquids, while two vertical lines indicates a liquid junction, whose potential difference is minimized. 

We can represent electrochemical cells with a compact notation called a cell diagram or line notation. For example, we can represent the electrochemical cell discussed previously in which Zn is oxidized to Zn and Cu is reduced to Cu as follows ... 

Notice that in the reduction half-reaction the principal species are all in the aqueous phase. In this case, the electron transfer needs an electrode on which to occur. An inert platinum electrode is employed, and the electron transfer takes place at its surface. Using line notation, we represent the electrochemical cell corresponding to the above reaction as ... 

Cell diagram or line notation is a technique for symbolizing electrochemical cells concisely by separating the components of the reaction using lines or commas. 

Describe the basic features of a cell diagram (or line notation) for an electrochemical cell. 

Use line notation to represent each electrochemical cell in Problem 43. 

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