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A sample of THAM primary standard base weighed 0.9180 grams. After dissolving in 100ml deionized water...

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Chemistry

A sample of THAM primary standard base weighed 0.9180 grams.After dissolving in 100ml deionized water and adding four drops ofbrom-cresol-green indicator, an HCl solution was added graduallyuntil a definite color change was observed. At this point, 28.20 mlof HCL solution had been drained from the buret. Using the equationfor the overall reaction, calculate the molarity of the HCl

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4.2 Ratings (694 Votes)

THAM base molar mass = 121.14 g/mol

THAM base moles = mass / molar mass

                               = 0.9810 / 121.14

                               = 0.00809

HCl moles = THAM base moles

                  = 0.00809

volume of HCl = 28.20 ml = 0.0282

molarity of HCl = moles / volume

                         = 0.00809 / 0.0282

                         = 0.287 M

molarity of HCl =0.287 M
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