Explain the Lewis concept of acid and base? How it is different f… - Vidyadip

Question

Explain the Lewis concept of acid and base? How it is different from Bronsted-Lowry concept? Explain.

✓

Answer

According to Lewis the substance which accept electron pair are known as acid and which donate lone pair electron are bases.
In this way definition of base is similar for BronstedLowry and Lewis concept as in both concepts base gives lone pair electron.
Hence according to Lewis acids are proton losing substances.
Generally between Lewis acid and base a coordination bond is formed.
$
\begin{array}{l}
BF_3+NH_3 \longrightarrow\left[BF_3 \longleftarrow NH_3\right] \\
\begin{array}{l}
\text { Lewis } \\
\text { acid }
\end{array} \\
\begin{array}{l}
\text { Lewis } \\
\text { base }
\end{array}
\end{array}
$

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