1. The concentration of either
the H+ ion or the OH− ion is given for four aqueous solutio ns at 298 K. For each solution , calculate [H+] or [OH−]. Sta te whether the solution is aci dic, basic, or neutral.
a. [H+] = 1.0 × 10−13M
b. [OH−] = 1.0 × 10−7M
c. [OH−] = 1.0 × 10−3M
d. [H+] = 4.0 × 10−5M
2. Challenge Calculate the num
ber of H+ ions and the number of OH− ions in 300 mL of pure water at 298 K.
READING CHECK Explain why you cannot obtain
the [H+] directly from the mol arity of a weak acid solution.
1. Calculate the pH of solutio
ns having the following ion co ncentrations at 298 K.
a. [H+] = 1.0 × 10−2M
b. [H+] = 3.0 × 10−6M
2. Calculate the pH of aqueous
solutions with the following [H+] at 298 K.
a. [H+] = 0.0055M
b. [H+] = 0.000084M
3. Challenge Calculate the pH
of a solution having [OH−] = 8.2 × 10−6M.