Question

What is the concentration of Hydrogen ions in 100.0 mL of 0.100 M H₂SO₄?

a) 0.500 M
b) 0.100 M
c) 0.200 M
d) 0.300 M

Answer 1

The concentration of hydrogen ions in 100.0 mL of 0.100 M H2SO4 is 0.200 M, calculated by multiplying the molarity of the acid by the number of hydrogen ions released per molecule of the acid.The correct answer is therefore (c) 0.200 M

Step-by-step explanation:

The question asks to determine the concentration of hydrogen ions in a 100.0 mL solution of 0.100 M H2SO4. Since sulfuric acid is a strong acid and fully dissociates, it releases two H+ ions for each molecule of H2SO4. Therefore, to find the concentration of hydrogen ions ([H+]), we need to take into account the stoichiometry of the dissociation.

Calculation steps:

1. Identify the molarity of the original sulfuric acid solution: 0.100 M.
2. Recognize that each H2SO4 molecule produces two H+ ions.
3. Multiply the original concentration by the number of hydrogen ions produced per molecule: 0.100 M * 2 = 0.200 M.

The correct answer is therefore (c) 0.200 M, which represents the concentration of H+ ions in the solution.