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The hydrogen ion concentration of a 10^-8M HCl aqueous solution at 298K (Kw = 10^-14) is A) 10^-6 B) 1.0525 x 10^-7 C) 9.525 x 10^-8 D) 10^-8?
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The hydrogen ion concentration of a 10^-8M HCl aqueous solution at 298...
Calculation of Hydrogen Ion Concentration

To calculate the hydrogen ion concentration of a 10^-8M HCl aqueous solution at 298K, we need to use the equation for the ion product constant of water:

Kw = [H+][OH-] = 10^-14

Since HCl is a strong acid, it dissociates completely in water to form hydrogen ions and chloride ions. Therefore, the hydrogen ion concentration of the solution is equal to the initial concentration of HCl:

[H+] = 10^-8M

Substituting this value into the equation for Kw:

10^-14 = (10^-8M)[OH-]

Solving for [OH-]:

[OH-] = 10^-6M

Since the solution is neutral, the hydrogen ion concentration must be equal to the hydroxide ion concentration:

[H+] = [OH-] = 10^-6M

Therefore, the correct answer is A) 10^-6.

Explanation

- The question asks us to calculate the hydrogen ion concentration of a 10^-8M HCl aqueous solution at 298K.
- To solve the problem, we need to use the equation for the ion product constant of water, which relates the concentrations of hydrogen ions and hydroxide ions in a neutral solution.
- Since HCl is a strong acid, it dissociates completely in water to form hydrogen ions and chloride ions. Therefore, the hydrogen ion concentration of the solution is equal to the initial concentration of HCl.
- Substituting the values into the equation for Kw, we can solve for the hydroxide ion concentration.
- Since the solution is neutral, the hydrogen ion concentration must be equal to the hydroxide ion concentration.
- Therefore, the correct answer is A) 10^-6.
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The hydrogen ion concentration of a 10^-8M HCl aqueous solution at 298...
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The hydrogen ion concentration of a 10^-8M HCl aqueous solution at 298K (Kw = 10^-14) is A) 10^-6 B) 1.0525 x 10^-7 C) 9.525 x 10^-8 D) 10^-8?
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