0.6g of copper sulfate pentahydrate is diluted into a 100mL volumetric flask, from which about 10...
0.6g of copper sulfate pentahydrate is diluted into a 100mL volumetric flask, from which about 10 mL of solution is pipetted into another 50mL volumetric flask to be diluted. What is the final concentration of this solution? The molar mass of copper sulfate pentahydrate is 249.69g/mol.
The final answer should be 4.806x10^-3 M. Please show all your work, thank you.
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0.6g of copper sulfate pentahydrate is diluted into a 100mL
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Here's what I think I have to do:
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PROBLEM: Predict the molar absorptivity value of copper
sulfate pentahydrate at 380 nm.
Here's what I think I have to do:
I think I need to use beer's law. Abs=ebc; e=Abs/bc.
b is 1.66 cm. I think c is .400 M NiSO4, but I'm not sure. I
also think Abs is 0.758 given the graph. (If wavelength is 380 nm,
then it should be between 0.598 and 0.798, right?) My answer is
1.14 L/mol*cm, but not sure if I am...
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Question 1 2 pts 3.34 mL of an unknown glucose solution was diluted in a 100.00 mL of volumetric flask with distilled water. 10mL of that solution and 4.00 mL of the ferricyanide reagent was placed in a second 100.00 mL volumetric flask and diluted to the mark with distilled water. Spectrophotometric analysis of the glucose/ferricyanide solution showed that the concentration of glucose was 0.070 M. What is the concentration of glucose in the unknown solution?
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