Question

at a ph of 7, which of the following would be true? multiple choice h⁺ and oh⁻ concentrations would be equal. none of the choices are correct. oh⁻ concentration would be greater than h⁺ concentration. h⁺ concentration would be greater than oh⁻ concentration.

Explanation:

In an aqueous solution, the relationship between \(\ce{H+}\) and \(\ce{OH-}\) concentrations is related to pH. A pH of 7 is considered neutral. At neutral pH (like in pure water at 25°C), the concentration of \(\ce{H+}\) ions (\([\ce{H+}]\)) is equal to the concentration of \(\ce{OH-}\) ions (\([\ce{OH-}]\)) because the auto - ionization of water \(\ce{H2O <=> H+ + OH-}\) has equal rates of production for \(\ce{H+}\) and \(\ce{OH-}\) at neutral conditions. So the statement " \(\ce{H+}\) and \(\ce{OH-}\) concentrations would be equal" is correct. The other options are incorrect because at pH 7, \([\ce{H+}]\) is not greater than \([\ce{OH-}]\) and vice - versa.

Answer:

A. \(\ce{H+}\) and \(\ce{OH-}\) concentrations would be equal.