Calculating Voltage (HSC SSCE Chemistry): Flashcards

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Calculating Voltage
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Alternative name for voltage in galvanic cells

Electromotive force (EMF)

Fundamental voltage equation

Etotal=Ered+EoxidE_{\text{total}} = E_{\text{red}} + E_{\text{oxid}}

Sign of oxidation voltage vs its reduction potential

Opposite sign

Effect of doubling half equation on electrode potential

No change

Meaning of positive cell voltage

Reaction proceeds as written (spontaneous)

Meaning of negative cell voltage

Reverse reaction is spontaneous

Equation for cell with unknown positive electrode

Ecell=εA−εBE_{\text{cell}} = \varepsilon_A - \varepsilon_B

Which electrode potential indicates reduction occurs

Higher electrode potential

What voltage of a reaction refers to

Voltage of reduction electrode vs other electrode

Electrode potentials measurement method

Experimentally using reference electrode

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