Table:
text: Phosphoric acid
Aqueous solution
Aqueous solution
_A_mol_L _H_3_PO_4_A_ _H_2_PO_4_A_ _HPO_4_2_A_ _PO_4_3_A_
1 91.7 8.29 6.20×10 −6 1.60×10 −17
10 −1 76.1 23.9 6.20×10 −5 5.55×10 −16
10 −2 43.1 56.9 6.20×10 −4 2.33×10 −14
10 −3 10.6 89.3 6.20×10 −3 1.48×10 −12
10 −4 1.30 98.6 6.19×10 −2 1.34×10 −10
10 −5 0.133 99.3 0.612 1.30×10 −8
10 −6 1.34×10 −2 94.5 5.50 1.11×10 −6
10 −7 1.80×10 −3 74.5 25.5 3.02×10 −5
10 −10 8.24×10 −4 61.7 38.3 8.18×10 −5

Question: What is the HPO4 2 that has less than 89.3 than H2PO 4 and 3.02 × 10 -5 as PO4 3 under phosphoric acid?

Question: What the [A] has more than 8.29 as H2PO 4 and 1.30 × 10 -8 as PO4 3 under phosphoric acid?

Question: Consider phosphoric acid, what is the [A] when the H2PO 4 is 61.7?