Wize High School Grade 12 Chemistry Textbook > Electrochemistry

Cell Notation

Cell Diagram

The cell diagram aka, standard cell notation is as follows:

$\text{| Anode | Ions from anode || Ions to cathode | Cathode |}$

If we wanted to write this notation for the galvanic cell we just drew...

These were the 2 half reactions that were involved:

Zn(s) → Zn2+ (aq) + 2e– Eoox = +0.76

Cu2+(aq) + 2e– → Cu(s) Eored = +0.34

| Zn(s) | Zn2+(aq) || Cu2+(aq) | Cu(s) |

It can also be called standard cell notation because it is describing SATP: ________ C,________ atm, [________ M]
Note that if a half cell does not contain a solid species then an inert electrode must be used. eg. Pt(s)

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Write the cell notation for the voltaic (or galvanic) cell that incorporates the following redox reaction:

$Al_{(s)}+Cr^{3+}_{(aq)} \to Al^{3+}_{(aq)}+Cr_{(s)}$

Al3+ +3e -> Al(s) Eored=-1.66V

Cr3+ + 3e- -> Cr(s) Eored=-0.73V

I have answered this question

Which of the following is the correct cell notation for the half reactions below:

Pb(s) --> Pb2+(aq) + 2e-

Fe3+(aq) + e- --> Fe2+(aq)

Pb(s) | Pb2+(aq) || Fe3+(aq) | Fe2+(aq)

Pb(s) | Pb2+(aq) || Fe3+(aq), Fe2+(aq) | Pt

Pt(s) | Fe3+(aq), Fe2+(aq) || Pb2+(aq) | Pb(s)

Fe3+(aq), Fe2+(aq) || Pb2+(aq)| Pb(s)

I don't know

In a zinc-lead cell the reaction is:

$Pb^{2+}\left(aq\right)+Zn\left(s\right)\to Pb\left(s\right)+Zn^{2+}\left(aq\right)\ \ \ \ \ \ \ E\degree=0.637V$

Which of the following statements about this cell is FALSE?

The zinc electrode is the cathode

The reaction will go in the direction indicated

The shorthand notation is $Zn\left(s\right)\ \mid Zn^{2+}\left(aq\right)\ \mid\mid Pb^{2+}\left(aq\right)\mid Pb\left(s\right)$

The lead electrode is positively charged

I don't know

Extra Practice

Write the cell notation for the voltaic (or galvanic) cell that incorporates the following redox reaction:

$Al_{(s)}+Cr^{3+}_{(aq)} \to Al^{3+}_{(aq)}+Cr_{(s)}$

Al3+ +3e -> Al(s) Eored=-1.66V

Write the cell notation for the voltaic cell that incorporates each of the following redox reactions:

$Al_{(s)}+Cr^{3+}_{(aq)} \to Al^{3+}_{(aq)}+Cr_{(s)}$
$Cu^{2+}_{(aq)}+SO_{2(g)}+2H_2O_{(l)} \to Cu_{(s)}+SO^{2-}_{4(aq)}+4H^+_{(aq)}$

Electrochemistry: Galvanic Cells

Construct a galvanic cell with the highest voltage given the following half reactions. Determine the voltage produced and express it in standard cell notation.

$Na^+_{(aq)} +e^- \to Na_{(s)} \hspace{40pt} E^o=-2.71V$

$S_2O_{8(aq)}^{2-} +2e^- \to 2SO_{4(aq)}^{2-} \hspace{20pt} E^o=2.01V$

Practice: Galvanic Cells

Galvanic Cell Practice

Construct a galvanic cell with the highest voltage given the following half reactions. Determine the voltage produced and express it in standard cell notation.

$Na^+_{(aq)} +e^- \to Na_{(s)} \hspace{40pt} E^o=-2.71V$

Practice: Galvanic Cells

Construct a galvanic cell with the highest voltage given the following half reactions. Determine the voltage produced and express it in standard cell notation.

$Na^+_{(aq)} +e^- \to Na_{(s)} \hspace{40pt} E^o=-2.71V$

$S_2O_{8(aq)}^{2-} +2e^- \to 2SO_{4(aq)}^{2-} \hspace{20pt} E^o=2.01V$

Practice: Galvanic Cells

Galvanic Cell Practice

Construct a galvanic cell with the highest voltage given the following half reactions. Determine the voltage produced and express it in standard cell notation.

$Na^+_{(aq)} +e^- \to Na_{(s)} \hspace{40pt} E^o=-2.71V$

Cell Notation

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Cell Diagram

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Extra Practice

Construct a galvanic cell with the highest voltage given the following half reactions. Determine the voltage produced and express it in standard cell notation.

Galvanic Cell Practice

Construct a galvanic cell with the highest voltage given the following half reactions. Determine the voltage produced and express it in standard cell notation.

Galvanic Cell Practice