Complete the mechanism for the reaction of 2-methylbutan-2-ol in sulfuric acid at 140 °C by adding any missing atoms, bonds, charges, nonbonding electrons, and curved arrows. Note the use of a generic alcohol to represent another 2-methylbutan-2-ol introduced in panel three.
Answer:
Option b = H2O + H2O <==> H3O+ + OH–
Explanation:
Dissociation of water:
The water molecule dissociate into the hydroxyl ion and hydrogen ion. The hydrogen ion immediately protonate the other water molecule and form the hydronium ion.
Chemical equation:
H2O + H2O <==> H3O+ + OH–
The equilibrium constant of self ionization of water is given below:
Kw= [H3O+][OH-]
[H3O+] is the concentration of hydronium ion while [OH-] is the concentration of hydroxyl ion.
Kw is called ionic product of water. The value of Kw is 1.0 × 10∧-14 at 25 °C.
The pure water consist of equal concentration of hydroxyl and hydrogen ions. In order to determine the molarity of both ions square root of ionic product (Kw) is taken.
[OH-]=[H+]= 1.0 × 10∧-7 M
In case of acidic solution concentration f hydrogen ions are greater than hydroxide ions. For example,
HCl when dissociate into water gives H+ and Cl-. The H+ ions increases in solution. The equilibrium is this given by water.
H2O ⇆ H+ + OH-
Reaction is forced to wards left. As a result concentration of hydroxide ions decreases.
In case of base solution like KOH when dissociate it gives K+ and OH -. The concentration of hydroxyl ions increases in this case and concentration of H+ is decreases and ionic product remain constant.
Among the given options, Option (D) that is O, 
will have the same number of protons. Hence option (D) is correct.
<h3>What are
protons ?</h3>
A stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron.
In option (D), All the three species (O, ) bears 8 protons but the number of electrons varies.
In any Ion, there will be no change in number of protons among the same atoms but number of electrons varies.
Therefore, Option (D) has same atoms but different ions.
Hence, it has same number of protons. Thus the correct answer is option (D)
Learn more about Protons here ;
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