Two drops of 0.20 M imidazole solution were added to a solution containing ferri

ID: 782400 • Letter: T

Question

Two drops of 0.20 M imidazole solution were added to a solution containing

ferrihemoglobin. The mass of the ferrihemoglobin solution was measured before the

addition of the imidazole and the mass of the final solution was measured after adding the

imidazole. The results are recorded in the following table:

Drops of

Imidazole

Solution

Mass of

Total Solution

(g)

Mass of Imidazole

Solution Added (g)

0 2.550 0

2 2.632 0.082

Assuming that the densities of all solutions are identical, calculate the concentration (in

molarity) of imidazole in the final solution after the 2 drops of imidazole were added.

(Since the experiment has been designed to ensure that imidazole is the excess reagent, the

concentration calculated can be assumed to be the equilibrium concentrations as well.)

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