An example of a polyprotic acid is?
B) HC2H3O2
C) H2SO4
D) HCN
Answer:
...an acid which can release more than one hydrogen ion. If the acids listed, HCl and HCN can clearly only release one hydrogen ion (they only have the one!). Option (B) is acetic acid, which is CH3-CO2H and again is monoprotic. That leaves (C), sulphuric acid - which ionises to form 2H+ & SO4(2-), so is polyprotic
H2SO4 because it will donate two H+ ions (or protons) when put into an aquious solution.
H(2)SO(4)
because there are two hydrogen atoms available for dissociation in this ion, whereas all the other ions have a single hydrogen atom.
You have two ionizations with sulfuric acid C)
H2SO4(aq) --> H+(aq) + HSO4-(aq)
and then
HSO4-(aq) --> H+(aq) + SO4-2(aq)
they will each have a different ionization constants
Ka1 = [H+][HSO4-]/[H2SO4]
and
Ka2 = [H+][SO4-2]/[HSO4-]
for sulfuric acid pKa1 = -3, and pKa2 = 1.99
c) H2SO4., bcause each molecule of sulphuric acid donates two H+ in solution
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