Weak Acid Strong Base Titrations Video Lessons

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Problem: Equal quantities of 0.010M solutions of an acid HA and a base B are mixed. The pH of the resulting solution is 9.3.Write equilibrium-constant expression for the reaction between HA and B.

FREE Expert Solution

We're asked to write the equilibrium-constant expression for the reaction between an acid, HA and a base, B.


Recall that the equilibrium constant is the ratio of the products and reactants: 


K=productsreactants     

Note that solid and liquid compounds are ignored in the equilibrium expression.



First, we need to write the equation for the reaction between HA and B, recall that:


 B is a base and based on Bronsted-Lowry definition it is a proton (H+) acceptor.

 HA is an acid and based on Bronsted-Lowry definition it is a proton donor.


The equation is: 

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Problem Details

Equal quantities of 0.010M solutions of an acid HA and a base B are mixed. The pH of the resulting solution is 9.3.

Write equilibrium-constant expression for the reaction between HA and B.

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Based on our data, we think this problem is relevant for Professor Eroy-Reveles' class at UCSC.