Hydrogen Ion Concentration from pH
Easywater chemistrypH
For a dilute aqueous solution, water with pH = 6 has an approximate hydrogen-ion concentration [H+] of:
- A10⁻³ M
- B10⁻⁶ M
- C10⁻⁷ M
- D10⁻¹⁴ M
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Answer: B. 10⁻⁶ M
For a dilute solution, pH ≈ −log₁₀[H⁺]. Rearranging gives [H⁺] ≈ 10^(−pH) = 10⁻⁶ mol/L.
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