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Lewis Theory

Which of the ...

Question

Which of the following are Lewis acids?
$H_{2} O, B F_{3}, H^{+}, N H_{4}^{+}$

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Solution

All cations are Lewis acids. So, $B F_{3}, H^{+}$ and $N H_{4}^{+}$ are Lewis Acid.

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Similar questions

Q. Which of the following are Lewis Acids? Why?
(i) H2O
(ii) BF3
(iii) H+
(iv) NH4+

Q. Find the number of molecules(s)/ion having Lewis acidic property from the following:

H_{2} O, N H_{3}, H^{+}, B F_{3}, A l H_{3}, ¯ C N, ¯ C H_{3}

Q. Classify the following into Lewis acids and Lewis bases:
(a)

H_{2} O

N H_{3}

H^{+}

B F_{3}

A I H_{3}

R O H

C H_{3} N H_{2}

C N^{-}

^{+} C H_{3}

Lewis acids : (c), (d), (e), (i)
Lewis bases : (a), (b), (f), (g), (h)
If true enter 1, else enter 0.

Q. Classify the following species as Lewis acids and Lewis bases.

N H_{3}, B F_{3}, S n C I_{4}, C_{2} H_{5} N H_{2}, C O, N i^{+}

Q. Which of the following Lewis acid – base interactions are associated with the further involvement of d-orbitals?

i)

S b F_{5} + H F \to H^{+} [S b F_{6}]^{-}

N H_{3} + B F_{3} \to H_{3} N B F_{3}

A l C l_{3} + C l^{-} \to A l C l_{4}^{-}

S F_{4} + F^{-} \to [S F_{5}]^{-}

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