Question

The hydrogen formed by the action of zinc on sulfuric acid forms a layer of gas on the surface of a copper plate in a simple voltaic cell, because of which.
A) Internal resistance of the cell increases.
B) Hydrogen ions are unable to reach the anode.
C) Polarization takes place at the anode.
D) All of the above.

Answer 1

We know that the Daniel cell or voltaic cell is a type of electrochemical cell which contains copper pot filled with copper (II) sulfate solution immersed in a sulfuric acid and a zinc electrode. Zinc sulfate is substituted for the sulfuric acid.

Complete step by step answer:
We must remember that in voltaic cells two dissimilar metals are immersed inside an electrolyte solution, the positive metal ions have a tendency to dissolve the leaving electros approaches the metal plate.
As we know that the sulfuric acid is a combination of hydrogen and sulfate. In a voltaic cell, the surface of the zinc electrode readily dissolves the sulfuric acid to form zinc sulfate then the positive ion travels to the copper electrode. In this process, the copper electrode gets positive charge while the zinc electrode gets negative charge in which potential is created between the copper and zinc electrodes.
In the simple voltaic cell the released hydrogen remains clinging to the copper electrode in the form of bubbles, while the active surface area is reduced and the cell’s ability to supply current is diminished which is known as polarization.
We have to remember that the hydrogen produced by the action of zinc on sulphuric acid gives a coating of gas on the surface of a copper plate in a simple voltaic cell, because of which:
Internal confrontation of cells increases.
Hydrogen ions are not capable of reaching the anode.
Polarization takes position at an anode.

So, the correct answer is Option D.

Note: As we know that the Daniel cell may be a method of chemistry cell imaginary in the year by John Frederic Daniel, a British chemist connected meteorologist, and contains a copper pot crowded with a copper (II) sulfate, during which is engrossed an unglazed ceramic ware instrumentation filled with sulphuric acid and a metallic element electrode. He was finding out the way to eliminate the atomic number 1 bubble downside found within the voltaic pile, and his solution was to use a second solution to consume the hydrogen made by the first. Zinc vitriol is also substituted for the element acid. The Daniel cell was an excellent improvement over the prevailing technology utilized in the first days of battery development. A later variant of the Daniel cell referred to as the gravity cell or herbaceous plant cell was unreal within the decennary by a Frenchman named Callaud and have become a well-liked selection for electrical telegraphy.