Table: phosphoric_acid_ratios
Columns: a_mol_l
h_3_po_4_a
h_2_po_4_a
hpo_4_2_a
po_4_3_a

Question: What's the HPO4 2 that has less than 89.3 as an H2PO 4 and 3.02×10 −5 as the PO4 3?
SQL: SELECT "hpo_4_2_a" FROM phosphoric_acid_ratios WHERE "h_2_po_4_a" < 89.3 AND "po_4_3_a" = '3.02×10 −5'

Question: What the [A] that has more than 8.29 as the H2PO 4 and 1.30×10 −8 as the PO4 3?
SQL: SELECT "a_mol_l" FROM phosphoric_acid_ratios WHERE "h_2_po_4_a" > 8.29 AND "po_4_3_a" = '1.30×10 −8'

Question: What's the [A] when the H2PO 4 is 61.7?
SQL: SELECT "a_mol_l" FROM phosphoric_acid_ratios WHERE "h_2_po_4_a" = 61.7