The pH of 40 cm3
a 0,05 mol∙dm–3 solution of H2
SO4
is
To find the pH of the solution, we can use the formula:
pH = -log[H+]
First, we need to find the concentration of H+ ions in the solution. Since H2SO4 is a strong acid, it fully dissociates in water, meaning that for every mole of H2SO4, we have 2 moles of H+ ions.
Given that the concentration of H2SO4 is 0.05 mol/dm^3, the concentration of H+ ions is twice that:
[H+] = 0.05 mol/dm^3 x 2 = 0.1 mol/dm^3
Now we can calculate the pH using the formula:
pH = -log(0.1)
Using a calculator, we find:
pH ≈ 1.0