A solution has pH = 0 its H+ ion concentration is__________________?
Correct answer: D. 1
- A. 1 x 10^-1
- B. 1 x 10^-14
- C. 1 x 10^-7
- D. 1
Explanation
Using pH = -log[H+], a pH of 0 gives [H+] = 10^0 mol/L = 1 mol/L. Thus the hydrogen-ion concentration is 1 mol/L. The common mistake is choosing 1 x 10^-7 mol/L, which is the hydrogen-ion concentration of a neutral solution at pH 7.
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About Buffer Solutions
Buffer solutions resist changes in pH when small amounts of acid or base are added, using a weak acid and its conjugate base or a weak base and its conjugate acid. Work includes buffer action, the common-ion effect, Henderson-Hasselbalch calculations, buffer capacity, and the difference between acidic and basic buffers.
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