Electrochemistry Unit 3 Objectives

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16 Questions

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

Electrolytic cell

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

Calculating the emf of a galvanic cell

What property of a solution does resistivity (ρ) and conductivity (κ) of ionic solutions depend on?

Concentration

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

The maximum conductivity of a solution

What law enunciates the variation of molar conductivity with concentration for electrolytic solutions?

Kohlrausch's law

Which process can be explained as an electrochemical process involving the gradual destruction of metals by chemical or electrochemical reaction with their environment?

Corrosion

What is the function of a galvanic or voltaic cell?

To produce electrical energy from spontaneous chemical reactions

In electrochemical cells, when the external potential exceeds 1.1 V, the cell functions as:

An electrolytic cell

What is the main difference between a galvanic cell and an electrolytic cell?

The galvanic cell produces electricity from spontaneous reactions, while the electrolytic cell uses electricity to drive non-spontaneous reactions.

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

To maintain electrical neutrality in the half-cells

What happens when the opposing voltage applied in a galvanic cell reaches 1.1 V?

The reaction stops altogether and no current flows through the cell

What is the importance of studying electrochemistry?

It helps in producing new technologies that are ecofriendly

What are some products that can be produced by electrochemical methods?

Metals, sodium hydroxide, chlorine, and fluorine

What is the electrical potential of a Daniell cell when the concentration of Zn2+ and Cu2+ ions is unity?

+1.1 V

What happens when Eext < 1.1 V in a galvanic cell?

Electrons flow from Zn rod to Cu rod, and Zn dissolves at anode while copper deposits at cathode.

What is the function of an electrolytic cell?

To carry out non-spontaneous chemical reactions using electrical energy

Test your understanding of electrochemical cells, Nernst equation, standard potential, Gibbs energy, resistivity, conductivity, and molar conductivity of ionic solutions with this quiz.

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