Which of the following ions is acidic?
-
A.
K+ -
B.
KNO3– -
C.
S2- -
D.
H3O+
Correct Answer: Option D
Explanation
Acids are substances which produces hydrogen ions (or protons) as the only positive ion when dissolved in water.
(H_{3}O^{+} to 2H^{+} + OH^{-})