CREATE TABLE table_13629 ("[A]  ( mol/L ) " TEXT, "[H 3 PO 4 ]/[A]  ( % ) " TEXT, "[H 2 PO 4 \\u2212 ]/[A]  ( % ) " FLOAT, "[HPO 4 2\\u2212 ]/[A]  ( % ) " TEXT, "[PO 4 3\\u2212 ]/[A]  ( % ) " TEXT)

What's the [A] when the H2PO 4 is 61.7?
SELECT "[A] (mol/L)" FROM table_13629 WHERE "[H 2 PO 4 \u2212 ]/[A] (%)" = '61.7'
SELECT "[A] (mol/L)" FROM "table_13629" WHERE "[H 2 PO 4 \u2212 ]/[A] (%)" = '61.7'