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Consider the titration of a 25.0 −mL sample of 0.110 M HC2H3O2 with 0.125 M NaOH....

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Chemistry

Consider the titration of a 25.0 −mL sample of 0.110 M HC2H3O2with 0.125 M NaOH. Determine each of the following.(please doall)

a)the initial pH

b)the volume of added base required to reach the equivalencepoint

c)the pH at 6.00 mL of added base

d)the pH at one-half of the equivalence point ,andt he pH at theequivalence point

Answer & Explanation Solved by verified expert
3.9 Ratings (654 Votes)
a CH3COOH dissociates as CH3COOH H CH3COO 011 0 0 011x x x Ka HCH3COOCH3COOH Ka xxcx Assuming x can be ignored as compared to c So above expression becomes Ka xxc so x sqrt Kac x sqrt 18105011 1407103 since x is comparable c our assumption is not correct we need to solve this using Quadratic equation Ka xxcx 18105 x2011x 198106 18105 x x2 x2 18105 x198106 0 This is quadratic equation ax2bxc0 a 1 b 18105 c 198106 Roots can be found by x b    See Answer
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