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In: Chemistry

mL HCl added pH 0.00 11.86 25.0 10.71 50.0 6.09 A titration of 25.0 mL of...

mL HCl added

pH

0.00

11.86

25.0

10.71

50.0

6.09

A titration of 25.0 mL of 0.100 M triethylamine ((CH3CH2)3N) was performed with 0.0500 M HCl. Given the following data calculate the pKa for triethylammonium ion.

Solutions

Expert Solution

answer :pKa= 10.71

(C2H5)3N + HCl-------------------->(C2H5)3NH+Cl- (salt)

25 x 0.1         0.05 x 25                     0

2.5                     1.25                         0                 at equivalence point

1.25                    0                           1.25

so in the solution salt + base remained. it can form buffer

now basic buffer pH formula

pH = 14

queen_honey_blossom answered 3 weeks ago
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