Which conjugate pair is suited best to make this buffer? which conjugate pair is suited best to make this buffer? dihydrogen phosphate ion h2po4− and monohydrogen phosphate ion hpo42− carbonic acid h2co3 and bicarbonate ion hco3− bicarbonate ion hco3− and carbonate ion co32− ammonium ion +nh4 and ammonia nh3 lactic acid ch3ch(oh)cooh and lactate ion ch3ch(oh)coo− monohydrogen phosphate ion hpo42− and phosphate ion po43− phosphoric acid h3po4 and dihydrogen phosphate ion h2po4− formic acid hcooh and formate ion hcoo− phenol c6h5oh and phenolate ion c6h5o− acetic acid ch3cooh and acetate ion ch3coo−