1.) Calculate the concentration of a solution prepared by adding 15.00 mL of 2.01×10−32.01×10-3 M KMnO4KMnO4...

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Question

1.) Calculate the concentration of a solution prepared by adding 15.00 mL of 2.01×10−32.01×10-3 M KMnO4KMnO4...

1.) Calculate the concentration of a solution prepared by adding 15.00 mL of

2.01 \times 10^{- 3}

M

K M n O_{4}

from a buret into a 50.00 mL volumetric flask, which is then filled to the 50.00 mL graduation mark with distilled water.

2.)A linear standard curve of

K

M

n

O

4

is prepared from a set of standard solutions by plotting absorbance (y) vs. concentration (x).

Absorbance Concentration (M)

0.264 6.00 x 10-4

0.211 4.80 x 10-4

0.158 3.60 x 10-4

0.106 2.40 x 10-4

0.0528 1.2 x 10-4

After plotting the standard curve, enter its slope below (not the equation of the line). Report your answer to 3 significant figures. If your answer ends in one or more zeros, use scientific notation.

3.) Suppose that an unknown sample is analyzed spectrophotometrically at the same wavelength that was used for the standard curve and the absorbance was found to be 0.182. Use the standard curve to find the concentration of the unknown.

science chemistry

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1.) Calculate the concentration of a solution prepared by adding 15.00 mL of 2.01×10−32.01×10-3 M KMnO4KMnO4...

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