Calculate the OH at 25 C. Identify each solution as neutral acidic or basic. a. H 1.0 10 7 M?

To calculate the hydroxide ion concentration (OH⁻) at 25°C, we can use the relationship ( K_w = [H^+][OH^-] ), where ( K_w = 1.0 \times 10^{-14} ). For a solution with ( [H^+] = 1.0 \times 10^{-7} , M ), we find ( [OH^-] = \frac{K_w}{[H^+]} = \frac{1.0 \times 10^{-14}}{1.0 \times 10^{-7}} = 1.0 \times 10^{-7} , M ). Since both the hydrogen and hydroxide ion concentrations are equal, the solution is neutral.