A compound can be both Bronsted acid and Lewis base at the same time. An element that has both nature is H2PO4-.
A compound that can acts as both a Brønsted-Lowry acid and base together are generally called amphoteric compounds.
In 1923, chemists Johannes Nicolaus Brønsted and Thomas Martin Lowry in their various studies created definitions of acids and bases using the abilities of compounds to either donate or accept protons ( H+ ions). A Bronsted-Lowry acid is known as any substance that releases H + ions;
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