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I need help with my viscosity experiment. I weighed out 1.0400 g of polymer and

ID: 633488 • Letter: I

Question

I need help with my viscosity experiment. I weighed out 1.0400 g of polymer and prepared a sample and dissolved in 50.0 mL of solvent. Then transfered a 25.0 mL aliquot of the polystyrene solution to a 50.0 mL volumetric flask and diluted with solvent to the mark. This is my 1/2 concentrated solution. Then transfered 25.0 mL aliquot of my 1/2 solution to a 50.0 mL volumetric flask. This is my 1/4 concentrated solution. I repeated two more time until I had a 1/16 concentrated solution. I then determined the flow times of each solution. I need to calculate the concentration of each polymer solution in grams of polymer per 100 ml of solution. (assume additivity of volumes) How do I calculate these concentrations????

Explanation / Answer

initial conc = 2.08gm/ 100ml

1st dilution conc= 1.04gm/100ml

2nd dilution= 0.52gm/100ml

3rd dilution = 0.26gm/100ml

4th dilution= 0.13gm/100ml

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