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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: RandomKemStudent on December 18, 2005, 03:51:04 PM

Title: back titration calculations
Post by: RandomKemStudent on December 18, 2005, 03:51:04 PM

I'm doing a titration lab to identify an unknown acid.  The acid was insoluble so i had to do a back titration to dissolve the acid (0.46g of the acid).  I used 25mL 0.5M NaOH to dissolve the acid and then i titrated that with 35mL of HCl. I have no clue what to do next if i should calculate the molarity of the HCl and then figuring out the mols of acid to find the molar mass. please *delete me*

Title: Re:back titration calculations
Post by: Borek on December 18, 2005, 04:53:35 PM

Quite opposite - HCl molarity should be known to you to allow calculation of number of moles of acid in the titrated sample.

Title: Re:back titration calculations
Post by: RandomKemStudent on December 18, 2005, 05:19:11 PM

Thanks borek that helped alot. I finally figured out what the unknown acid was.  :D