Which pairing matches the type of substance with the item it donates? a. acid: h ion; base: proton b. acid: proton; base: electron pair c. acid: electron pair; base: proton d. acid: electron pair; base: h ion

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Which pairing matches the type of substance with the item it donates? a. acid: h ion; base: proton b. acid: proton; base: electron pair c. acid: electron pair; base: proton d. acid: electron pair; base: h ion

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B is the right choice.
Lowry Bronsted [which is usually a Lewis base] the base can donate a pair of electrons to the hydrogen ion. The proton is a Lewis acid and can accept a pair of electrons.
Lewis acid is a substance that can accept a pair of unattached electrons and the base of Lewis is a substance that can donate a pair of unattached electrons.