Answer:
1) HCl has the greater concentration of H⁺ ions than HF.
2) pH of HCl = 1.
pH of HF = 2.1.
Explanation:
1) which solution has the greater concentration of H+ ions?
HCl is completely ionized in the solution to produce H⁺ and Cl⁻.
∴ 0.1 M HCl has H⁺ concentration of (0.1 M).
0.1 M of HF has H⁺ concentration of (7.9 x 10⁻³ M).
∴ HCl has the greater concentration of H⁺ ions than HF.
2) Calculate pH values for the two solutions:
∵ pH = - log[H⁺]
[H⁺] = 0.1 M.
∵ pH = - log[H⁺]
∴ pH = - log[H⁺] = - log(0.1 M) = 1.
[H⁺] = 7.9 x 10⁻³ M.
∵ pH = - log[H⁺]
∴ pH = - log[H⁺] = - log(7.9 x 10⁻³ M) = 2.1.
