Question:
An example of a Lewis acid is:
An example of a Lewis acid is:
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AlCl\(_3\) is a typical Lewis acid because the aluminum atom has an empty orbital that can accept electron pairs.
Updated On: Apr 22, 2026
- NaCl
- MgCl\(_2\)
- AlCl\(_3\)
- SnCl\(_4\)
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The Correct Option is C
Solution and Explanation
Step 1: Identifying Lewis acids.
A Lewis acid is a substance that can accept a pair of electrons. This typically happens when the species has an empty orbital that can accept an electron pair.
Step 2: Explanation of the options.
- (1) NaCl: Sodium chloride is an ionic compound and does not have an electron-deficient center.
- (2) MgCl\(_2\): Magnesium chloride is also not a Lewis acid; it is a simple ionic compound.
- (3) AlCl\(_3\): Aluminum chloride is a Lewis acid because the aluminum atom has an empty orbital and can accept an electron pair.
- (4) SnCl\(_4\): Tin chloride is also a Lewis acid, but it is less strongly acidic than AlCl\(_3\).
Step 3: Conclusion.
The correct answer is (3) AlCl\(_3\).
A Lewis acid is a substance that can accept a pair of electrons. This typically happens when the species has an empty orbital that can accept an electron pair.
Step 2: Explanation of the options.
- (1) NaCl: Sodium chloride is an ionic compound and does not have an electron-deficient center.
- (2) MgCl\(_2\): Magnesium chloride is also not a Lewis acid; it is a simple ionic compound.
- (3) AlCl\(_3\): Aluminum chloride is a Lewis acid because the aluminum atom has an empty orbital and can accept an electron pair.
- (4) SnCl\(_4\): Tin chloride is also a Lewis acid, but it is less strongly acidic than AlCl\(_3\).
Step 3: Conclusion.
The correct answer is (3) AlCl\(_3\).
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