The pyridinium ion (C5H4NH+) is a weak acid (Ka = 5.60 x 10–6). Calculate the pH of a solution that results from adding 1.00 mL of 0.158 M KOH to 27.7 mL of 0.174 M C5H4NH+ solution.

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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The pyridinium ion (C5H4NH+) is a weak acid (Ka = 5.60 x 10–6). Calculate the pH of a solution that results from adding 1.00 mL of 0.158 KOH to 27.7 mL of 0.174 C5H4NH+ solution.

 

 

The decomposition of a single compound at 378 K has a rate constant of 8.19 x 10-3 M-1 s-1. If the initial concentration of the reactant is 1.478 M, what is the concentration of the reactant after 87.22 seconds?

(the answer should be entered with 3 significant figures; do not enter units; give answer in normal notation--examples include 1.23 and 12.3 and 120. and -123)

 

 

 

If 3.47 grams of silver have been plated on a piece of metal from an AgNO3 solution after 6.95 minutes, what was the current (in amps) used to accomplish this?

(the answer should be entered with 3 significant figures; do not enter units; give answer in normal notation--examples include 1.23 and 120. and -123 and 123. and 12.3)

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