# A student weighed out a sample of acid powder and found the mass to be 1.17 g. When the solution turned pink..

A student weighed out a sample of acid powder and found the mass to be 1.17 g. When the solution turned pink, the student read the buret accurately and found it to be 39.46 mL. If the base concentration is 0.1592 M, what is the molecular weight of the unknown acid?

Answer:
these are funnnnn

ok so find moles of base added

0.03946 L x 0.1592 M = 0.00628 mol

we assume the acid and base are 1:1 in terms of reaction thus 0.00628 mol of acid must have also been needed

Molar mass = g/mol = 1.17g/0.00628 = 186.31

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