Atriprotic acid ( h3a ) has pka values of 3.28 ( pka1 ), 5.74 ( pka2 ), and 8.20 ( pka3 ). which of the equalities is true when the ph is 3.28 ? [h2a−]=[a3−] [ha2−]=[a3−] [h2a−]=[ha2−] [h3a]=[h2a−] [h3a]=[ha2−] which of the equalities is true when the ph is 5.74 ? [h3a]=[h2a−] [h2a−]=[ha2−] [h2a−]=[a3−] [h3a]=[ha2−] [ha2−]=[a3−] which of the equalities is true when the ph is 8.20 ? [h2a−]=[ha2−] [h2a−]=[a3−] [h3a]=[h2a−] [h3a]=[ha2−] [ha2−]=[a3−] which of the equalities is true when the ph is 4.51 ? [h2a−]=[a3−] [h3a]=[ha2−] [h2a−]=[ha2−] [ha2−]=[a3−] [h3a]=[h2a−] which of the equalities is true when the ph is 6.97 ? [h3a]=[h2a−] [h3a]=[ha2−] [h2a−]=[a3−] [ha2−]=[a3−] [h2a−]=[ha2−] what is the predominant species of h3a at ph 1.97 ? a3− h3a ha2− h2a− what is the predominant species of h3a at ph 4.10 ? ha2− a3− h2a− h3a what is the predominant species of h3a at ph 6.72 ? h2a− ha2− a3− h3a what is the predominant species of h3a at ph 9.68 ? ha2− h2a− h3a a3−