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An organic acid concentration in a hard sample was determined by diluting a 15.00 mL sample...

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Chemistry

An organic acid concentration in a hard sample was determined bydiluting a 15.00 mL sample of 200.00 mL solution. A 20.00 mLportion of the diluted sample reacted with 40.0 mL of 0.05417 MNaOH completed. The excess OH- was back titrated with 5.21 mL of0.02154 M HCL. The concentration of the organic acid in the orginalsample is:

Answer is 1.370 M

Answer & Explanation Solved by verified expert
3.8 Ratings (677 Votes)
we know that moles molarity x volume ml 1000 so moles of HCl added 002154 x 521 1000 moles of HCl added 1122234 x 104 now first consider the reaction of OH and HCl the reaction is    See Answer
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