Question

At 25°C, aqueous solutions with a pH of 8 have a hydroxide ion concentration, (OH), of

a) 1 x 10⁻⁶ M
b)1 x 10⁻⁵ M
c) 1 x 10⁻⁸ M
d) 1x10⁻¹⁴ M​

Answer 1

At 25°C, aqueous solutions with a pH of 8 have a hydroxide ion concentration of 1 x 10⁻⁶ M.

Step-by-step explanation:

At 25°C, aqueous solutions with a pH of 8 have a hydroxide ion concentration (OH) of 1 x 10⁻⁶ M.

According to the pH scale, a pH of 8 indicates a slightly basic solution. The pH scale is a logarithmic scale that measures the concentration of hydronium ions (H₃O⁺) in a solution. The hydroxide ion concentration can be calculated using the equation pOH = -log[OH⁻]. By rearranging this equation and substituting the given pH value of 8, we can find that the hydroxide ion concentration is 1 x 10⁻⁶ M.