Unit 2: Electrochemical Cells and Ionic Solutions

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16 Questions

What is the Nernst equation used for in the context of electrochemical cells?

Calculating the emf of the galvanic cell

Which type of cell uses electrical energy to carry out non-spontaneous chemical reactions?

Electrolytic cell

What does resistivity (r) measure in the context of ionic solutions?

Opposition to the flow of current

What does molar conductivity at zero concentration or infinite dilution (✆m) represent?

Maximum conductivity of the solution

What does Kohlrausch law describe in relation to molar conductivity?

Decrease in molar conductivity with increasing concentration

Which type of cell uses chemical reactions to produce electrical energy?

Galvanic cell

In electrochemistry, which type of cell converts chemical energy into electrical energy?

Voltaic cell

What happens when an external potential equal to 1.1 V is applied in a galvanic cell?

The redox reaction stops and no current flows through the cell

What is the function of an electrolytic cell in electrochemistry?

Carries out non-spontaneous chemical reactions using electrical energy

Which type of cell is used for producing metals, sodium hydroxide, and chlorine by electrochemical methods?

Electrolytic cell

What is the electrical potential of a Daniell cell when the concentration of Zn2+ and Cu2+ ions is unity (1 mol dm–3)?

+1.1 V

What happens when an external potential greater than 1.1 V is applied in a galvanic cell?

The reaction reverses and starts in the opposite direction

Which process do batteries and fuel cells perform?

Convert chemical energy into electrical energy

What is the purpose of a salt bridge in an electrochemical cell?

To maintain electrical neutrality in the half-cells

What is the significance of studying electrochemistry for creating new technologies?

To create technologies that are energy efficient and less polluting

What is the role of electrochemistry in the transmission of sensory signals through cells to brain and vice versa?

It is involved in generating electrical signals for communication between cells

Test your knowledge of electrochemical cells, Nernst equation, standard potential, resistivity, conductivity, and molar conductivity of ionic solutions. This quiz covers the key concepts and principles related to electrochemistry and ionic solutions as outlined in Unit 2.

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