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What kind of particles are present in an aqueous 1 M H2SO4 solution? In what relative quantities are they present? Make a ranking, start with the most common particle.
pKs(H2SO4) is -3, pks(HSO–4) = 1.92.
Note: Es [translation unavailable] only following particles before: H2O, H3O+, HSO–4, SO2-4, (almost) no H2SO4, there sulphuric acid a strong acid is
Solution: - The pKs(H2SO4) = -3, which means that H2SO4 is a very strong acid, and so it releases almost 100% of its first (!) H+, but that leaves almost no H2SO4.
x > y > z > c(H2SO4) - The additionally 1 M H2SO4 it says:, that per litres water (=1000 g/M(H2O) = 55 mol) only a Mol H2SO4 present is. So the water is clearly in excess: 55.5 mol H2O + 1 mol H2SO4 –> 54.5 mol H2O + 0 mol H2SO4 + 1 mol H+
c(H2O) > x > y > z > c(H2SO4). Open up are thus still c(H3O+), c(HSO–4), c(SO2-4) - The pks(HSO–4) = 1.92, thus approx. 2 it says:, that at the same time, starting of (z.B.) 1000 HSO–4 itself in the GW approx. A one-hundredth (pKs = 2 = -log(0.01) = -log(1/100)) on the page of the products (thus SO2-4) is located, the large remains remaining at the same time, reactant (: HSO–4). It holds u.a. Thus:
c(HSO–4) > c(SO2-4) - Open up is still the question after H3O+. From the the first reaction is generated at least a Mol, at other follow-up actions to be created other H3O+. All other concentrations moving itself in the size orders of which: a Mol.
- The following sequence is thus obtained:
c(H2O) > c(H3O+) > c(HSO–4) > c(SO2-4) > H2SO4.
- The pKs(H2SO4) = -3, which means that H2SO4 is a very strong acid, and so it releases almost 100% of its first (!) H+, but that leaves almost no H2SO4.
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