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Consider the titration of 50.0 mL of 0.45 M HCN with 0.25 M KOH. Calculate the pH before any KOH...

Question:

Consider the titration of 50.0 mL of 0.45 M HCN with 0.25 M KOH. Calculate the pH before any KOH has been added.

Weak Acids:

A weak acid is characterized by its incomplete dissociation in aqueous solution. The extent by which it dissociates can be quantified by using the percent ionization or acid dissociation constant. It is important to note that the percent ionization is dependent on the initial concentration.

Answer and Explanation: 1

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The pH is dependent solely on the weak acid HCN before any KOH is added. Thus, we solve for the pH of the weak acid in solution. We also use the 5%...

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Weak Acids: Properties & Examples

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Chapter 28 / Lesson 13
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Learn the definition of weak acids, study common examples, discover the difference between strong and weak acids, and understand how to write weak acid equilibrium equations.


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