Which statement best describes the pH of pure water? It is neutral because the concentration of hydronium ions equals that of hydroxide ions. It is neutral because the pure liquid contains neither hydronium ions nor hydroxide ions. It is acidic because it has a hydronium ion concentration of 1.0 times 10 to the negative 7 moles per liter.. It is basic because it has a hydroxide ion concentration of 1.0 times 10 to the negative 7 moles per liter..