CHM116 W10 test 2 prep

CHM116 W10 test 2 prep - Test#2 prep Be able to identify...

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• Be able to identify common strong acids and strong bases • Understand the relationship between an acid and its conjugate base (including K a and K b ; p K a and p K b ) • Recognize ionic salts that contain conjugates of weak acids or bases, and thus affect pH of aqueous solutions • Be able to find the K a and p K a of a weak acid if given its initial M concentration and the solution pH and vice versa ex/ What pH will a 0.01 M solution of lactic acid have? K a = 1.4 x 10 -4 ex/ If a 0.20 M solution of an acid, HA, yields a pH of 4.66, what is its K a ? • Be able to find the pH of a buffer solution when you have the initial concentrations of the weak acid and its conjugate base in the solution and the acid K a . ex/ Consider the titration of the weak acid HCOOH (formic acid) with the strong base NaOH. The K a for HCOOH is 1.8 x 10 -4 . Before you added any base, the HCOOH in water dissociated according to its K a . Write a balanced chemical equation for HCOOH dissociating in water. Write the simplest equilibrium expression that defines the K a of HCOOH dissociating in water. Calculate the pH of a 0.1 M aqueous solution of HCOOH
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This note was uploaded on 05/15/2011 for the course CHM 116 taught by Professor Matchett during the Fall '11 term at Grand Valley State.

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CHM116 W10 test 2 prep - Test#2 prep Be able to identify...

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