Question

Calculate the [H+] in a solution that has a pH of 2.45.

a. 2.4M
b. 11.6M
c. 3.5e-3M
d. 2.8e-12M

Answer 1

To find the concentration of hydrogen ions [H+] in a solution with a pH of 2.45, use the formula [H+] = 10^{-pH}. The answer is 3.5 x 10^-3 M, which corresponds to option c.

Step-by-step explanation:

To calculate the concentration of hydrogen ions ([H+]) in a solution with a given pH, you use the inverse of the logarithmic function applied in the pH calculation. The formula to find [H+] given the pH is as follows:

[H+] = 10^{-pH}

For a solution with a pH of 2.45, the calculation would be:

[H+] = 10^{-2.45} = 3.5 \times 10^{-3} M

Therefore, the correct answer is c. 3.5e-3M.