Acids and Bases 3

Given the pH of a sol'n is 7.4, what is the H₃0⁺ concentration
- 10 ^ ^-pH
- (Note: 7.40 is 2 places past decimal, your answer should be this: 4.0x10^{-8 )}
Given the pH of a sol'n is 9.61, what is the -OH concentration

First find the pOH: 14-9.61 = 4.39. Now you can do this: 10 ^ ^(-4.39) = 4.1x10^-5
So, from pH to H30+

10^^-pH
A sample of gastric juice has a H₃0⁺ concentration of 0.045. What is the pH

-log (0.045) = 1.35 (since there are 2 sig figs in the concentration, put 2 places past the pH)
Given pK_a find K_a

-logK_a
Know how to use the Henderson-Hasselbalch equation.

Remember that the [A^-] is the CB SALT and [HA^-] is the ACID. "A" for acid and use this acid's pK_a

Author

Yellow2

122610

Card Set

Acids and Bases 3

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Acids and Bases 3

Updated

2011-12-11T04:59:58Z

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