Answer: 0.001 M
Explanation:
pH is the negative logarithm of hydrogen ion concentration in a solution. Mathematically, pH is expressed as
pH = -log(H+)
where H+ is hydrogen ion concentration
So, 3 = -log(H+)
(H+) = Antilog (-3)
(H+) = 0.001
Thus, [H+] concentration is 0.001 M
