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Calculate the pH and pOH of the solutions with the following hydrogen ion or hydroxide ion concentrations. Indicate which solutions are acidic, basic, or neutral. (And please show how to solve! Thanks!) a. [OH-]= 7.69x10^-3 M b. [OH-]= 2.18x10^-9 M c. [H+]= 4.0x10^-8 M d. [H+]= 3.56x10^-4 M

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