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NO..even it's a week acid having structural formula CH3COOH.
Yes it is, forming trivalent Borate(BO3-3) anions.
because it has three replaceable hydrogen atoms
a tria basic acid is a acid containing three replacable hdrogen atoms
Yes it is. Formula H3PO3.
Because it can form Phosphite salts containing PO3-3 anions.
But its structure is not like Boric acid(H3BO3)