To determine the concentration of
H+ions in the resulting solution, we need to consider the contributions of HCl and
H2SO4. Both provide
H+ions but in different proportions.
First, let's break it down for each acid:
1. Hydrochloric Acid
(HCl) :
HCl is a strong acid that dissociates completely in water:
HCl⟶H++Cl−The given concentration of HCl is
0.1M. Therefore, the concentration of
H+ions contributed by HCl in the solution is also
0.1M.
2. Sulfuric Acid
(H2SO4) :
H2SO4 is a strong acid and dissociates completely into two
H+ions and one
SO4‌2− ion:
H2SO4⟶2H++SO4‌2−The given concentration of
H2SO4 is
0.2M. Each mole of
H2SO4 produces 2 moles of
H+ions. Therefore, the concentration of
H+ions contributed by
H2SO4 in the solution is:
0.2M×2=0.4MWhen equal volumes of the two solutions are mixed, the concentration of
H+ions in the resulting solution is the average of the two contributions.
Hence, the overall concentration of
H+ions in the resulting solution is:
‌=‌=0.25MTherefore, the concentration of
H+ions in the resulting solution is 0.25 M .
Option D is the correct answer.