Question

You wish to prepare 50.0 mL of 2.30 x 10-2 M solution of Cipro (C17H18FN3O3). Describe...

You wish to prepare 50.0 mL of 2.30 x 10-2 M solution of Cipro (C17H18FN3O3). Describe how to prepare this solution from the pure drug and deonized water. Volumetric flasks and analytical balances are available to use.  

The molecular weight of Cipro is 331.4 g

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Homework Answers

Answer #1

Molarity of soluiton is given by

M = (weight/mol.wt)(1000/V(mL))

Given that, M = 2.30 x 10-2 M

mol.wt = 331.4 g/mol

Volume = 50mL

Mass of Cipro to be taken = w = M*mol.wt*V(mL)/1000

w = 2.30 x 10-2 *331.4*50/1000 = 0.3811 g

Preparation: Weigh exactly 0.3811 g of Cipro and transfer it to the 50mL standard flask and add few mL of water to just dissolve the sample with shaking. Now add enough volume of water till the mark present on the top of standard flask carefully.

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