Two flasks containing 100 mL of unknown concentrations of hydrofluoric acid, HF(aq), and hydrocholoric acid, HCl (aq), are found in the lab. When tested, they both have a pH of 1. Which acid is more concentrated, HF or HCl? Choose the best explanation. [The pertinent acid dissociation constants are: K(HCl) = 1.3 x 106; K(HF) = 6.8 x 10-4]
a) HF because it is a weak acid that partially dissociates in water.
b) HCl because it is a strong acid that fully dissociates in water.
c) They have equal concentrations because they both have the same pH of 1.
d) HF because with less dissociation, more HF is necessary in order to have equally low pH.
e) HCl because with more dissociation, more HCl is necessary in order to have equally low pH.