Calculate the concentration [H +] [OH-] and the molar concentration of sulfuric acid

Calculate the concentration [H +] [OH-] and the molar concentration of sulfuric acid in a solution with a pH of 1.4

1. Sulfuric acid is strong, therefore, in water it completely decomposes into hydrogen ions and sulfate ions:

H₂SO₄ → 2H⁺ SO₄^2-

2. Find the index of hydroxide ions:

pH = -lg [H +];

pH + pOH = 14;

pOH = 14 – pH = 14 – 1.4 = 12.6;

3.Calculate the concentration of hydrogen and hydroxide ion:

[H +] = 10-1.4 = 0.0398 mol / L;

[OH-] = 10-12.6 = 2.51 * 10-13 mol / L;

4.the concentration of a strong dibasic acid is half the concentration of protons in a solution:

С (H2SO4) = 2 * [H +] = 0.0398: 2 = 0.02 mol / l.

Answer: [H +] = 0.0398 mol / l, [OH-] = 2.51 * 10-13 mol / l, С (H2SO4) = 0.02 mol / l.