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-log(2.3 X 10^-3 M)

= 2.6

14 - 2.6 = 11.4 pH ( OH - )

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What does pure water tell us if it has a oh level of 7?

A pH level of 7 in pure water indicates that it is neutral, meaning it is neither acidic nor basic. This neutrality is a characteristic of pure water at 25°C (77°F), where the concentration of hydrogen ions (H⁺) equals that of hydroxide ions (OH⁻). This balanced state is essential for various chemical reactions and biological processes. In practical terms, water with a pH of 7 is generally considered safe and ideal for drinking and most applications.


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When an aqueous solution at room temperature is analyzed the H is found to be 2.0 103 M. What is the OH?

To find the hydroxide ion concentration ([OH^-]) in an aqueous solution, you can use the relationship given by the ion product of water at room temperature, (K_w = [H^+][OH^-] = 1.0 \times 10^{-14}) at 25°C. Given that ([H^+] = 2.0 \times 10^{-3} , M), you can rearrange the equation to find ([OH^-]): [ [OH^-] = \frac{K_w}{[H^+]} = \frac{1.0 \times 10^{-14}}{2.0 \times 10^{-3}} = 5.0 \times 10^{-12} , M. ] Thus, the hydroxide ion concentration is (5.0 \times 10^{-12} , M).


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