kiarabermudez754
22.02.2021 •
Chemistry
A chemist titrates 220.0 mL of a 0.8578 M pyridine (CH_N) solution with 0.6906 M HBr solution at 25 °C. Calculate the pH at equivalence. The pK, of
pyridine is 8.77
Round your answer to 2 decimal places.
Note for advanced students: you may assume the total volume of the solution equals the initial volume plus the volume of HBr solution added.
pH ?
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Ответ:
hey there!
mass = 6.75 g
volume = 9 cm³
therefore:
d = mass / volume
d = 6.75 / 9
d = 0.7 g/cm³
answer b