Assertion : [Al(H_2O)_6]^{3+} is a stronger a | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The acidity of metal complexes depends on the charge-to-size ratio (ionic potential) of the central metal ion. $Al^{3+}$ has a higher charge $(+3)

Vedclass · Accepted Answer

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

Vedclass · Answer

(A) The acidity of metal complexes depends on the charge-to-size ratio (ionic potential) of the central metal ion. $Al^{3+}$ has a higher charge $(+3)$ and a smaller ionic radius compared to $Mg^{2+}$ $(+2)$. This results in a higher charge density for $Al^{3+}$,which polarizes the $O-H$ bond in the coordinated water molecules more effectively,facilitating the release of $H^+$ ions. Therefore,$[Al(H_2O)_6]^{3+}$ is a stronger acid than $[Mg(H_2O)_6]^{2+}$. Both the Assertion and the Reason are correct,and the Reason correctly explains the Assertion.

Assertion : $[Al(H_2O)_6]^{3+}$ is a stronger acid than $[Mg(H_2O)_6]^{2+}$.
Reason : Size of $[Al(H_2O)_6]^{3+}$ is smaller than $[Mg(H_2O)_6]^{2+}$ and possesses more effective nuclear charge.

Similar Questions

Which one is the most likely structure of $CrCl_3 \cdot 6H_2O$ if $1/3$ of total chlorine of the compound is precipitated by adding $AgNO_3$ to its aqueous solution?

Which among the following is a correct decreasing order of thermodynamic stability of the complexes?

Which of the following represents the correct increasing order of the spectrochemical series (field strength) for some common ligands?

Write the correct order of the spectrochemical series for the given ligands.

$CuSO_4$ reacts with $KCN$ solution and forms:

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Assertion : $[Al(H_2O)_6]^{3+}$ is a stronger acid than $[Mg(H_2O)_6]^{2+}$.Reason : Size of $[Al(H_2O)_6]^{3+}$ is smaller than $[Mg(H_2O)_6]^{2+}$ and possesses more effective nuclear charge.