Which of the following are Lewis acids? H_2O, | vedclass

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(B) Lewis acids are defined as chemical species that can accept a lone pair of electrons.$BF_3$ has an incomplete octet on the Boron atom,making it an

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$BF_3, H^{+}, NH_4^{+}$

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(B) Lewis acids are defined as chemical species that can accept a lone pair of electrons.$BF_3$ has an incomplete octet on the Boron atom,making it an electron-deficient species.$H^{+}$ is a proton and has an empty $1s$ orbital,allowing it to accept an electron pair.$NH_4^{+}$ contains a nitrogen atom that has already donated its lone pair to a proton,but the species as a whole can act as a Lewis acid in certain contexts due to the positive charge and the ability to accept electrons to revert to $NH_3$ and $H^{+}$.$H_2O$ acts as a Lewis base because it has lone pairs on the oxygen atom that it can donate.Therefore,$BF_3, H^{+},$ and $NH_4^{+}$ are Lewis acids.

Which of the following are Lewis acids? $H_2O, BF_3, H^{+}, NH_4^{+}$

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