Potentiometry and Electrochemistry Fundamentals

Chemistry

This text introduces potentiometry, a branch of electrochemistry, explaining how potential differences arise in systems, both externally applied and spontaneously generated. It details Alessandro Volta's discovery of electricity generation through chemical reactions, specifically using a metal rod in water. The example of a zinc rod in water illustrates the development of a negative charge on the rod and a positive charge in the solution due to the release of zinc ions and electrons, eventually reaching an equilibrium state.

Electrochemistry Potentiometry Chemical Reactions

12 Questions Easy Ages 14+ Dec 17, 2025

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About this Study Set

This study set covers Chemistry through 12 practice questions. This text introduces potentiometry, a branch of electrochemistry, explaining how potential differences arise in systems, both externally applied and spontaneously generated. It details Alessandro Volta's discovery of electricity generation through chemical reactions, specifically using a metal rod in water. The example of a zinc rod in water illustrates the development of a negative charge on the rod and a positive charge in the solution due to the release of zinc ions and electrons, eventually reaching an equilibrium state. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 12 questions from the Potentiometry and Electrochemistry Fundamentals study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What is the name of the science that studies processes where a potential difference arises spontaneously?

A Electrolysis
B Potentiometry
C Electrochemistry
D Voltaic science

2 In the 19th century, who discovered that electric current could be generated by a chemical reaction?

A Michael Faraday
B Alessandro Volta
C Svante Arrhenius
D Antoine Lavoisier

3 When a zinc rod is placed in water, what charge does the metal rod develop over time?

A Positive
B Neutral
C Negative
D Alternating

4 According to Figure 1, what happens to the zinc rod when it releases zinc ions into the solution?

A It gains a positive charge.
B It becomes neutral.
C It releases electrons.
D It develops a negative charge.

5 The equation Zn → Zn²⁺ + 2e⁻ represents which process?

A Reduction
B Oxidation
C Neutralization
D Dissociation

6 What causes the liquid (water) to gain a positive charge when a zinc rod is placed in it, as described in the text?

A The water absorbs electrons.
B The water absorbs positive zinc ions.
C The water releases its own positive ions.
D The water gains a negative charge from the rod.

7 Why does the zinc rod release fewer positive ions as its negative charge increases?

A The positive ions are repelled by the solution.
B The negative charge on the rod repels the positive ions.
C The positive ions are attracted to the water.
D The concentration of ions in the solution becomes too high.

8 What is reached when, per unit of time, the same number of ions leave the solution as return to the rod?

A A reaction completion
B An equilibrium situation
C A phase change
D A saturation point

9 Once equilibrium is reached, what happens to the potential difference between the rod and the solution?

A It increases continuously.
B It decreases to zero.
C It remains constant.
D It fluctuates rapidly.

10 What is the concentration of [Zn²⁺] in the solution after equilibrium is reached?

A It increases further.
B It decreases significantly.
C It remains unchanged.
D It becomes zero.

11 The interaction between metal atoms and ions in a solution, as described with the zinc rod, is also observed in what other process mentioned?

A Evaporation
B Condensation
C Electrolysis
D Diffusion

12 In the electrolysis of a ZnSO₄ solution, if a Zn rod is used as the anode, what is being removed from the solution?

A Oxygen
B Water molecules
C Zinc ions
D Sulfate ions

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