Question

The equation for the pH of a substance is pH = –log[H+], where H+ is the concentration of hydrogen ions. A basic solution has a pH of 11.2. An acidic solution has a pH of 2.4. Based from the given, what is the approximate difference in the concentration of hydrogen ions between the two solutions? A. 1.6*10^-9 B. 4.0*10^-3 C. 6.7*10^-1 D. 1.6*10^-11

Answer 1

Answer:

graph b

Explanation:

Answer 2

For the basic solution:
11.2 = -log[H+]
[H+] = 6.31 x 10⁻¹²
For the acidic solution:
2.4 = -log[H+]
[H+] = 3.98 x 10⁻³
The difference:
3.98 x 10⁻³ - 6.31 x 10⁻¹²
≈ 4.0 x 10⁻³
The answer is B