Electrochemistry Basics

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Questions and Answers

What happens to the reaction if E0cell is negative?

The reaction would be non-spontaneous.

Define resistivity and its unit.

Resistivity is the resistance of a conductor of 1cm length and having an area of cross-section equal to 1cm2. Its unit is ohm-cm.

What is the relationship between conductance and resistance?

Conductance is the reciprocal of resistance.

How does the value of molar conductance change with dilution?

<p>The value of molar conductance increases with dilution and attains a maximum value at infinite dilution.</p> Signup and view all the answers

According to Kohlrausch law of independent migration of ions, how can the limiting molar conductivity of an electrolyte be expressed?

<p>The limiting molar conductivity of an electrolyte can be expressed as the sum of the contributions of individual ions in the solution.</p> Signup and view all the answers

What is the difference between an anode and a cathode in a galvanic cell?

<p>Anode is where oxidation takes place, while cathode is where reduction takes place.</p> Signup and view all the answers

Define electromotive force (emf) in the context of electrochemistry.

<p>The difference of potential which causes current to flow from the electrode of higher negative potential.</p> Signup and view all the answers

What is the significance of the standard hydrogen electrode (SHE) in electrochemistry?

<p>The potential of SHE is assigned an arbitrary value of zero, serving as a reference electrode for measuring standard electrode potentials.</p> Signup and view all the answers

How does the standard emf of a cell relate to the standard electrode potentials of the cathode and anode?

<p>E0cell = E0cathode - E0anode</p> Signup and view all the answers

What is the relationship between the standard emf of a cell and the spontaneity of a reaction?

<p>If E0cell is positive, ΔG° would be negative and the reaction would be spontaneous.</p> Signup and view all the answers

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