Homework Answers
Q1. concentration of solution = 5.91 x 10-4M
Q2. Slope = 3.80 x 102M-1
Q3. concentration of unknown = 4.79 x 10-4M
Explanation
Q1. According to dilution law, C1 * V1 = C2 * V2
where C1 = initial concentration = 1.97 x 10-3 M
V1 = initial volume = 15.00 mL
C2 = final concentration
V2 = final volume = 50.00 mL
Substituting the values,
C2 = C1 * (V1 / V2)
C2 = (1.97 x 10-3 M) * (15.00 mL / 50.00 mL)
C2 = (1.97 x 10-3 M) * (0.3)
C2 = 5.91 x 10-4 M
Q2. 
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3. Suppose that an unknown sample is analyzed spectrophotometrically at the same wavelength that was used...
3. Suppose that an unknown sample is analyzed
spectrophotometrically at the same wavelength that was used for the
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standard curve to find the concentration of the unknown.
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Calculate the concentration of a solution prepared by adding 15.00 mL of 1.98 × 10 −...
Calculate
the concentration of a solution prepared by adding 15.00 mL of 1.98
× 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
1. Calculate the concentration of a solution prepared by adding 15.00 mL of 1.98 x 10-3M KMnO, from a buret into a 50.00 mL volumetric flask, which is then filled to the 50.00 mL graduation...
I. If a solution absorbed yellow light, what color would the solution appear to be? Hint: 1. Calculate the concentration of a solution prepared by adding 15.00 mL of 2.09 x 10-3 M KMnO, from a buret into a 50.00 mL volumetric flask, which is then filled to the 50.00 mL graduation mark with distilled water. Hint: *M Your answer is incorrect - Check your calculations. 2. A linear standard curve of KMnO4 is prepared from a set of standard...
I. If a solution absorbed yellow light, what color would the solution appear to be? Hint: Indigo 1. Calculate the concentration of a solution prepared by adding 15.00 mL of 2.09 x 10-3 MKMnO4 from a buret into a 50.00 mL volumetric flask, which is then filled to the 50.00 mL graduation mark with distilled water. Hint: 0.000627 M 2. A linear standard curve of KMnO4 is prepared from a set of standard solutions by plotting absorbance (y) vs. concentration...
I. If a solution absorbed orange light, what color would the solution appear to be? Hint: 1. Calculate the concentration of a solution prepared by adding 15.00 mL of 1.96 x 10-'MKMnO from a buret into a 50.00 mL volumetric flask, which is then filled to the 50.00 mL graduation mark with distilled water. Hint: M 2. A linear standard curve of KMnO4 is prepared from a set of standard solutions by plotting absorbance (y) vs. concentration (x). Use Logger...
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 0.196. Use the
standard curve to find the concentration of the unknown.
1. Calculate the concentration of a solution prepared by adding 15.00 mL of 1.98 x 10-3 M KMnO, from a buret into a 50.00 mL volumetric flask, which is then filled to the 50.00 mL graduation mark with distilled water. Hint:...
I. If a solution absorbed violet light, what color would the solution appear to be? Hint: 1. Calculate the concentration of a solution prepared by adding 15.00 mL of 1.92 x 10-3 M KMnO, from a buret into a 50.00 mL volumetric flask, which is then filled to the 50.00 mL graduation mark with distilled water. Hint: 2. A linear standard curve of KMnO4 is prepared from a set of standard solutions by plotting absorbance (y) vs. concentration (x). Use...
1. If a solution absorbed yellow light, what color would the solution appear to be? Hint: indigo 1. Calculate the concentration of a solution prepared by adding 15.00 mL of 2.05 x 10-'MKMnO, from a buret into a 50.00 mL volumetric flask, which is then filled to the 50.00 ml graduation mark with distilled water. Hint: 2. A linear standard curve of KMnO, is prepared from a set of standard solutions by plotting absorbance (y) vs. concentration (x). Use Google...
2. A linear standard curve of KMnO is prepared from a set of standard solutions by plotting absorbance (y) vs. concentration (x). Use Logger Pro (as described in the Data Analysis for this experiment), or Google Sheets/Excel, to plot this standard curve using the data in Table 1. Help with spreadsheets [PDF] Table 1: Data for the standard curve of KMnO4 Absorbance Concentration (M) 0.330 6.00 x 10-4 0.264 4.80 x 10-4 0.198 3.60 x 10-4 0.132 2.40 x 10-4...
1. If a solution absorbed blue-green light, what color would the solution appear to be? Hint: Table I, at the beginning of the experiment, will help you answer this one. 1. Calculate the concentration of a solution prepared by adding 15.00 mL of 2.09 ~ 10-3M KMnO4 from a buret into a 50.00 mL volumetric flask, which is then filled to the 50.00 ml graduation mark with distilled water. Hint: M 2. A linear standard curve of KMnO4 is prepared...
Calculate
the concentration of a solution prepared by adding 15.00 mL of 1.98
× 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
1. Calculate the concentration of a solution prepared by adding 15.00 mL of 1.98 x 10-3M KMnO, from a buret into a 50.00 mL volumetric flask, which is then filled to the 50.00 mL graduation...
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