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Questions and Answers
In a galvanic cell, how is the potential difference between two electrodes measured?
In a galvanic cell, how is the potential difference between two electrodes measured?
- By connecting them to a potentiometer
- By connecting them to a voltmeter (correct)
- By connecting them to an ammeter
- By connecting them to a resistor
In the standard hydrogen electrode setup, what is the potential assigned to the SHE?
In the standard hydrogen electrode setup, what is the potential assigned to the SHE?
- 0.5 volts
- -1 volt
- 0 volts (correct)
- 1 volt
What components are needed to make an electrode a standard reference electrode?
What components are needed to make an electrode a standard reference electrode?
- Temperature at 273K
- Hydrogen gas at pressure of 1 atm
- Solution containing hydrogen ions at 0.5 mol dm-3
- Hydrogen gas at pressure of 100 kPa and solution containing hydrogen ions at 1.00 mol dm-3 (correct)
Why are standard conditions necessary for a reference electrode like the standard hydrogen electrode?
Why are standard conditions necessary for a reference electrode like the standard hydrogen electrode?
In a cell diagram, how is the hydrogen electrode represented?
In a cell diagram, how is the hydrogen electrode represented?
How does changing the concentration of Mn+ ions affect the redox equilibrium in a cell?
How does changing the concentration of Mn+ ions affect the redox equilibrium in a cell?
What happens to Ecell as the reactant concentrations drop in a cell reaction?
What happens to Ecell as the reactant concentrations drop in a cell reaction?
What is the relationship between Ecell and the likelihood of a reaction occurring?
What is the relationship between Ecell and the likelihood of a reaction occurring?
How does increasing the concentration of Fe2+ and decreasing Zn2+ affect Ecell?
How does increasing the concentration of Fe2+ and decreasing Zn2+ affect Ecell?
What effect does a temperature rise have on Ecell for exothermic cells?
What effect does a temperature rise have on Ecell for exothermic cells?
What does a positive Ecell value indicate about a reaction?
What does a positive Ecell value indicate about a reaction?
How does carrying out a reaction at non-standard conditions affect Ecell compared to standard conditions?
How does carrying out a reaction at non-standard conditions affect Ecell compared to standard conditions?
What is the standard electrode potential for the half cell: Cu2+(aq) | Cu(s)?
What is the standard electrode potential for the half cell: Cu2+(aq) | Cu(s)?
How can the percentage apparatus uncertainty in a titration be reduced?
How can the percentage apparatus uncertainty in a titration be reduced?
In the reaction Mg + Cu2+ → Cu + Mg2+, which species is undergoing reduction?
In the reaction Mg + Cu2+ → Cu + Mg2+, which species is undergoing reduction?
What effect does using a balance that measures to more decimal places have on the percentage uncertainty in weighing a solid?
What effect does using a balance that measures to more decimal places have on the percentage uncertainty in weighing a solid?
What is the standard electrode potential for the half cell: Mg2+(aq) | Mg(s)?
What is the standard electrode potential for the half cell: Mg2+(aq) | Mg(s)?
How does reducing the uncertainty in a burette reading affect the volume of the titre?
How does reducing the uncertainty in a burette reading affect the volume of the titre?
Which electrode will oxidize and go from right to left in a redox reaction?
Which electrode will oxidize and go from right to left in a redox reaction?
What is the impact of using burettes with lower apparatus uncertainty in a titration?
What is the impact of using burettes with lower apparatus uncertainty in a titration?
To determine the Ecell for a spontaneous change, what formula is used?
To determine the Ecell for a spontaneous change, what formula is used?
When looking at a series of measurements, which experiments will have the highest experimental uncertainties?
When looking at a series of measurements, which experiments will have the highest experimental uncertainties?
What will happen in a spontaneous change with regards to the Ecell value?
What will happen in a spontaneous change with regards to the Ecell value?
How does taking two readings during a titration affect the uncertainty on the titre volume?
How does taking two readings during a titration affect the uncertainty on the titre volume?
What type of electrochemical cell is a non-rechargeable cell?
What type of electrochemical cell is a non-rechargeable cell?
In the primary non-rechargeable cells provided, what is the overall reaction for the Dry Cell example?
In the primary non-rechargeable cells provided, what is the overall reaction for the Dry Cell example?
What is the standard electrode potential for the primary Lithium–manganese dioxide non-rechargeable cell?
What is the standard electrode potential for the primary Lithium–manganese dioxide non-rechargeable cell?
Which component is not present in the conventional cell diagram of the primary Lithium–manganese dioxide non-rechargeable cell?
Which component is not present in the conventional cell diagram of the primary Lithium–manganese dioxide non-rechargeable cell?
What is the oxidation half-reaction for the forward reaction in the Lead acid secondary rechargeable cell?
What is the oxidation half-reaction for the forward reaction in the Lead acid secondary rechargeable cell?
What is the cell potential for the Lead acid secondary rechargeable cell?
What is the cell potential for the Lead acid secondary rechargeable cell?
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