Which option correctly shows the concentration of H3O* ions in pure water?

Question

(1 point)
• 1.0 × 10-7 mol/L
• 7 mol/L
• 1.0 x 10-14 mol/L
• 14 mol/L

Answer 1

In pure water at 25°C, the concentration of hydronium ions (H₃O⁺) is \(1.0 \times 10^{-7}\) mol/L. This is due to the self-ionization of water, where water dissociates into equal concentrations of H₃O⁺ and OH⁻ ions.

Therefore, the correct option is:

• 1.0 × 10^-7 mol/L.