Consider the following transformations:
(I) XeF6 + NaF Na+[XeF7]-
(II) 2PCl5(s) [PCl4]+[PCl6]-
(III) [Al(H2O)6]3+ + H2O [Al(H2O)5OH]2+ + H3O+
Possible transformations are:

Question

Consider the following transformations:
(I) XeF6 + NaF $\rightarrow$ Na+[XeF7]-
(II) 2PCl5(s) $\rightarrow$ [PCl4]+[PCl6]-
(III) [Al(H2O)6]3+ + H2O $\rightarrow$ [Al(H2O)5OH]2+ + H3O+
Possible transformations are:

Prashant Kotian · Accepted Answer

Correct answer: A. Step 1: Examine reaction I: XeF6 acts as a Lewis acid to accept a fluoride ion from NaF, forming Na+[XeF7]^- (feasible). Step 2: Examine reaction II: In the solid state, phosphorus pentachloride (PCl5) auto-ionizes into tetrahedral [PCl4]+ and octahedral [PCl6]- ions (feasible). Examine reaction III: The hexaaquaaluminium cation [Al(H2O)6]3+ is acidic and undergoes hydrolysis in water to produce [Al(H2O)5OH]2+ and hydronium (feasible). Step 3: Since all three transformations (I, II, and III) are chemically possible, option (a) is the correct choice.

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