Galvanic cells, Nernst equation, batteries, corrosion, solid state structures, semiconductors and nanomaterials.
35 cards · basic cards · AI-written, checked twice. Edit anything.
- What is a galvanic cell?
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An electrochemical cell that spontaneously produces electrical current from a redox reaction- At which electrode in a galvanic cell does oxidation occur?
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At the anode- At which electrode in a galvanic cell does reduction occur?
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At the cathode- What is the function of a salt bridge in a galvanic cell?
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It allows anions and cations to migrate between compartments to maintain electrical neutrality- What formula relates standard cell potential to reduction potentials?
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E(cell) = E(cathode) - E(anode)- When is a redox reaction spontaneous in a galvanic cell?
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When E(cell) is positive- What does the Nernst equation relate?
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The relationship between cell potential and the concentrations of reactants and products- What is the Nernst equation at 25 degrees Celsius?
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E = E(0) - (0.0592 V / n) log(Q)- In the Nernst equation, what does Q represent?
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The reaction quotient, the ratio of product concentrations to reactant concentrations- How does temperature affect the coefficient in the Nernst equation?
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It increases with temperature, becoming approximately 0.0615 V at 37 degrees C instead of 0.0592 V- What is E(cell) equal to when Q equals K?
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Zero, because the system is at equilibrium- What is the main difference between primary and secondary batteries?
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Primary batteries are non-rechargeable, secondary batteries can be recharged- What is the standard EMF of an alkaline battery?
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1.5 V- In a lead-acid battery, what material forms the negative electrode?
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Lead (Pb)- In a lead-acid battery, what material forms the positive electrode?
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Lead dioxide (PbO2)
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