Question 32

[kwon.denni6401]

Please correct me if I'm mistaken.

A bronsted-lowry base may or may not be a lewis base. However, a lewis base is always a bronsted-lowry base.

Is this true? If so, why couldn't the answer to 32 also be lewis base?

(I understand why the more obvious choice is bronsted base as the H is clearly being extracted but I can't understand why the answer choice 'lewis base' is incorrect)

Thanks for the clarification

[jellywing_2058]

Lewis base: substance that donates an electron pair
Bronsted-Lowry base: substance that accepts a proton (hydrogen)

A bronsted base is always a Lewis base, but a Lewis base is not always a Bronsted base because donating an electron pair doesn’t always directly involve a Hydrogen; the electron pair can be donated to sodium for example in order to form a bond.
You need a Bronsted base because a Hydrogen is being accepted, however you are right (this also means that a Lewis base is needed since a Bronsted base is a Lewis base), only saying Bronsted is more precise.

[admin]

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