How many mL of a o.110 M NaoH would be required to neutralize a 0.450 g sample o

Question

How many mL of a o.110 M NaoH would be required to neutralize a 0.450 g sample of aspirin sample. You may assume aspirin is acetylsalicylic acid. molar mass = 180 g/mol. When KSCN is added to an aqueous solution containing Fe^+3 a deep red solution appears. If NaF is added to the iron solution before the KSCN, the red color is not produced. a. Assuming Fe^+3 has a coordination number of 6, write the formula for each of the 2 Fe complexes. __________ __________ b. Which is the stronger ligand? Write the formula of the more stable complex. Justify your conclusion.

Explanation / Answer

Q1.

V = ? for M = 0.11 NaOH

aspirin = 0.45

MW = 180 g /mol

mol = mass/MW = 0.45/180 = 0.0025 mol of aspirin

note that aspirin is monoprotic so

0.0025 mol of aspirin = 0.0025 mol of base

M = mol/V

V = mol/M

V = 0.0025 / 0.11 = 0.0227272 Liters = 22.72 mL required

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