CREATE TABLE "aqueous_solution" (
  "a_mol_l" text,
  "h_3_po_4_a_pct" text,
  "h_2_po_4_a_pct" real,
  "hpo_4_2_a_pct" text,
  "po_4_3_a_pct" text
);

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_pct" FROM "aqueous_solution" WHERE "h_2_po_4_a_pct"<89.3 AND "po_4_3_a_pct"='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 "aqueous_solution" WHERE "h_2_po_4_a_pct">8.29 AND "po_4_3_a_pct"='1.30×10 −8';

Question: What's the [A] when the H2PO 4 is 61.7?
SQL: SELECT "a_mol_l" FROM "aqueous_solution" WHERE "h_2_po_4_a_pct"=61.7;