pHpOHCalcs

pHpOHCalcs - pH and pOH Calculations The values on the pH...

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pH and pOH Calculations • The values on the pH scale are derived by the mathematical conversion of the H + ion concentration to pH values. pH = - log[H + ] • Solutions that contain more H + ions than OH - ions are acidic and have pH values less than 7. • Solutions that contain less H + ions than OH - ions are basic and have pH values greater than 7 Calculate the pH of a solution if [H + ] = 2 x 10 -5 M. pH = 5 – log 2 The 5 is the exponent from the original concentration. = 5 – 0.30 = 4.7 1. Find the pH of solutions with the following H + concentrations. Tell whether the solution is acidic , basic or neutral . a) 1.15 x 10 -6 M 5.94 acidic b) 5.75 x 10-8 M 7.24 basic c) 7.44 x 10-11 M 10.13 basic d) 5.11 x 10-3 M 2.29 acidic e) 7.57 x 10-9 M 8.12 basic f) 6.2 x 10-12 M 11.21 basic 2. Find the [H+] and the pOH of the following solutions (remember: pH + pOH = 14). a) pH = 3 1.0 x 10-3M 11 b) pH = 9 1.0 x 10-9M 5 c) pH = 6 1.0 x 10-6M 8

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Calculate the [H + ] when you have a pH of 8.3
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This note was uploaded on 01/09/2011 for the course SCIENCE 12084 taught by Professor Mrdavidbyrum during the Spring '10 term at Harrison College.

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pHpOHCalcs - pH and pOH Calculations The values on the pH...

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