Q21.9P - Chemistry: Molecular Nature Of Matter And Change

Question

Which statements are true? Correct any that are false. 

(a) In a voltaic cell, the anode is negative relative to the cathode. 

(b) Oxidation occurs at the anode of a voltaic or electrolytic cell. 

(c) Electrons flow into the cathode of an electrolytic cell. 

(d) In a voltaic cell, the surroundings do work on the system. 

(e) A metal that plates out of an electrolytic cell appears on the cathode. 

(f) The cell electrolyte provides a solution of mobile electrons.

Step-by-Step Solution

Answer

All statements are true except statements (d) and statement (f).

Step 1: Definition of Electrochemistry

Electrochemistry is a discipline of physical chemistry concerned with the relationship between electrical potential as a quantifiable and quantitative phenomenon and recognizable chemical change, with electrical potential as an outcome of a specific chemical change or vice versa.

Step 2: Explanation of whether the statement is true or false.

a) True 

b) True 

c) True 

d) False,

Correction: The energy is released due to the spontaneous reaction. The system does work on the surrounding. 

e) True 

f) False, 

Correction: The cell electrolyte provides a solution of mobile ions.