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Unformatted text preview: When the pH is less than 7, the solution is acidic, when the pH = 7 it is neutral, and when it is greater than 7, it is basic. 1) In this problem, there are 0.685 moles of HCl dissolved in 1.5 L H 2 O, making a total acid concentration of 0.457 M. To find the answer, take the negative log of this to find that the pH = 0.34 2) pH = 1.55 3) pH = 2.53 4) The pH of this solution is 6.35, making the solution very slightly acidic. 5) The pH will be 6. This is solved in the same way that dilution problems are solved. If the pH = 4, this means that the concentration of [H + ] present is 0.0001 M. When you use the dilution equation, M 1 V 1 = M 2 V 2 , where V 2 is 1000 mL, you find that the concentration of acid after dilution is 1.00 x 10-6 , which corresponds to a final pH of 6....
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- Fall '09