Matching -A Phosphate Buffer Solution at PH = PK₁ = 2.15

Matching
-A phosphate buffer solution at pH = pK₁ = 2.15 would have equal amounts of phosphate in the ______ form and the H₂PO₄^- form.

A) hydrogen bond
B) rotational
C) H₃PO₄
D) H₂PO₄–
E) HPO₄ 2–
F) disordered
G) positive entropy
H) negative entropy
I) higher electronegativity
J) insoluble
K) tetrahedral arrangement
L) acid
M) base
N) only partially ionized