0.422 gram sample of an unknown acid (HX) required 26.75 mL of 0.244 M NaOH for...
0.422 gram sample of an unknown acid (HX) required 26.75 mL of 0.244 M NaOH for neutralization to a phenolphthalein end point. What is the molar mass of the acid?
Homework Answers
HX = NaOH
moles of base is equal to moles of acid.
moles of base = M X volume = 0.244 x 0.02675 = 0.006527 moles.
then 0.006527 moles of acid molar mass = mass/moles = 0.422/0.006527 = 64.65 grams.
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