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Unformatted text preview: 4. What is the pH of a 0.10 M solution of acetic acid (CH 3 COOH)? K a = 1.8 x 105 HA H+ + AInitial 0.1 Changex +x +x Equilibrium 0.1x x x x = 1.34 x 103 = [H + ] Therefore, pH =  log [H + ] = 2.87 5. What is the K a of butanoic acid, CH 3 CH 2 CH 2 COOH, if a 0.025 M solution has a pH of 3.21? HA H+ + AInitial 0.025 Changex +x +x Equilibrium 0.025x x x Since the pH = 3.21, the [H+] concentration can be calculated to be 6.17 x 104 . Therefore x = 6.17 x 104 ....
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 Spring '10
 Flood
 pH, Acid rain, initial change equilibrium

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