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10 Questions

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Electrochemistry and Galvanic Cells

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Questions and Answers

What is the primary reason for using an alternating current (AC) source of power?

To resolve the first difficulty of connecting a solution to a bridge (correct)

To increase the voltage across the conductivity cell

To improve the conductivity of the platinum electrodes

To reduce the resistance of the connecting wires

What is the purpose of the conductivity cell?

To separate the platinum electrodes from the solution

To reduce the resistance of the solution

To confine the solution between the electrodes (correct)

To measure the voltage across the electrodes

What is the material used to coat the platinum electrodes?

Copper

Silver

Gold

Platinum black (correct)

What is the symbol used to denote the cell constant?

G* Signup and view all the answers

What is the unit of the cell constant?

Length^-1 Signup and view all the answers

Why is it inconvenient to measure l and A?

Because it is difficult to accurately measure l and A Signup and view all the answers

How is the cell constant usually determined?

By measuring the resistance of the cell containing a solution whose conductivity is already known Signup and view all the answers

What is the purpose of electrochemically depositing finely divided metallic Pt on the electrodes?

To increase the surface area of the electrodes Signup and view all the answers

What is the equation that gives the resistance of the solution column?

R = r l/A Signup and view all the answers

What is the shape of the solution column?

Cylindrical Signup and view all the answers