Homework Answers
Answer 2-
Percentage Transmittance = 36.2 %
Absorbance = ?
We know that,
Absorbance = 2 - log10 (%T)
where, %T = Percentage Transmittance
Put the value,
Absorbance = 2 - log10 (36.2)
Absorbance = 2 - 1.56
Absorbance = 0.44 [Answer]
Answer 3 - boiling point of a liquid at std pressure (760 mm Hg) be higher or lower than its observed boiling point if it i boilid at lower atmospheric Pressure = ?
The BOILING POINT of a liquid is directly proportional to the Vapor Pressure. So, if the Vapor Pressure is lowered the Boiling Point is lowered and if the Vapor Pressure is increased the Boiling Point is increased.
So, Boiling Point of a liquid at a standard atmospheric pressure is higher than its observed boiling point if it is boiled at lower atmospheric pressure. [Answer]
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1. (a) A student is diluting a stock solution of a Vitamin C solution. The concentration...
answers plzz and thank you. 1. (a) A student is diluting a stock solution of a...
answers plzz and thank you.
1. (a) A student is diluting a stock solution of a Vitamin C solution. The concentration of the stock solution is 3.687x10 M. 4.00 mL of the stock solution was transferred into a 50 ml volumetric flask and diluted to the mark with water. What is the final concentration of the dilute Vitamin C solution? (Refer to page 70 in the lab manual). (b) Would a solution prepared the same way but with 2.00 ml...
2. Convert a percent transmittance reading of 58.1% into absorbance. (Refer to pages 11 and 65...
2. Convert a percent transmittance reading of 58.1% into absorbance. (Refer to pages 11 and 65 of the lab manual). 3. Will the boiling point of a liquid be higher or lower than its boiling point at standard atmospheric pressure (760 mm Hg) if it is boiled at a lower atmospheric pressure? (Refer to page 66 in the lab manual)
Start with a 1230.0 ppm Stock Zn solution. Prepare control 1 by diluting 2.00 mL of Stock Zn solution in a 200.0 mL...
Start with a 1230.0 ppm Stock Zn solution. Prepare control 1 by diluting 2.00 mL of Stock Zn solution in a 200.0 mL volumetric flask and dilute to the mark. Prepare control 2 by diluting 2.00 mL of control 1 into a 100.0 mL volumetric flask. What is the Zn concentration (ppm Zn) in control 2? Report your answer to 4 decimal place.
1. A series of dilute NaCl solutions are prepared starting with an initial stock solution of...
1. A series of dilute NaCl solutions are prepared starting with an initial stock solution of 0.100 M NaCl. Solution A is prepared by pipeting 10 mL of the stock solution into a 250-mL volumetric flask and diluting to volume. Solution B is prepared by pipeting 25 mL of solution A into a 100-mL volumetric flask and diluting to volume. Solution C is prepared by pipeting 20 mL of solution B into a 500-mL volumetric flask and diluting to volume....
Please type in the Computer so I can be able to read it. A student need...
Please type in the Computer so I can be able to read it.
A student need to prepare four standard solutions by serially diluting a stock solution with concentration 5.0 times 10^-4 N. Standard I will be created by transferring 5.00 mL of the stock solution to the mark with deionized water. The remaining standard solutions (Standards 2 - 4) will be created by transferring 25.00 mL of the previously made standard solution to a 50.00 mL volumetric flask, then...
A student is instructed to determine the concentration of a solution of CoCl2 based on absorption...
A student is instructed to determine the concentration of a solution of CoCl2 based on absorption of light (spectrometric/colorimetric method). The student is provided with a 0.10 M solution of CoCl2 with which to prepare standard solutions with concentrations of 0.020 M, 0.040 M, 0.060 Mand 0.080 M (a) Describe the procedure for diluting the 0.10 M solutions to a concentration of 0.020 M using distilled water, a 100 mL volumetric flask, and a pipet or buret. Include specific amounts where...
3. A student repeated the experiment with a different compound, Biomarker X. The equation for the...
3. A student repeated the experiment with a different compound, Biomarker X. The equation for the line of best fit from their calibration curve was y = 3.612x104 X+0.0060. If the original concentration of the student's unknown sample of Biomarker X was 8.25x104 M, what is the expected percent transmittance of the diluted unknown sample? Percent Transmittance: Show Your Calculations Below: A. Concentration of Biomarker by Spectrophotometry: Concentration of Stock Biomarker Solution (M): 1.1754 10M **Note: Measure the Percent Transmittance...
Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 M...
Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 M Sr(NO3)2 solution to 150.0 mL. 1.13 M 0.0313 M 0.0199 M 0 0.0501 M 0.0887 M
Preparing Dilute Solutions C1 V1 C2 V2 C1 is the concentration of the original concentrated solution...
Preparing Dilute Solutions C1 V1 C2 V2 C1 is the concentration of the original concentrated solution V1 is the volume of the original concentrated solution C2 is the concentration of the final dilute solution V2 is the volume of the final dilute solution A common solution unit is mol/L which can also be written as M. A solution that is 0.1 M NAOH has 0.1 moles Na OH for every liter of solution. Beer's Law Calibration Curve A colored solution...
Prelab: Analysis for iron content of a vitamin Answers can only be entered/graded between 2019-11-01 and...
Prelab: Analysis for iron content of a vitamin Answers can only be entered/graded between 2019-11-01 and 2019-11-06 You have been given a jar of red fruit punch and been asked to determine the concentration of red dye in the fruit punch. You obtain a stock solution of this red dye and it has a concentration of 0.00220 M in the lab room, the stock solution is found in the hood). You take 10.0 mL of this stock solution and dilute...
answers plzz and thank you.
1. (a) A student is diluting a stock solution of a Vitamin C solution. The concentration of the stock solution is 3.687x10 M. 4.00 mL of the stock solution was transferred into a 50 ml volumetric flask and diluted to the mark with water. What is the final concentration of the dilute Vitamin C solution? (Refer to page 70 in the lab manual). (b) Would a solution prepared the same way but with 2.00 ml...
2. Convert a percent transmittance reading of 58.1% into absorbance. (Refer to pages 11 and 65 of the lab manual). 3. Will the boiling point of a liquid be higher or lower than its boiling point at standard atmospheric pressure (760 mm Hg) if it is boiled at a lower atmospheric pressure? (Refer to page 66 in the lab manual)
Start with a 1230.0 ppm Stock Zn solution. Prepare control 1 by diluting 2.00 mL of Stock Zn solution in a 200.0 mL volumetric flask and dilute to the mark. Prepare control 2 by diluting 2.00 mL of control 1 into a 100.0 mL volumetric flask. What is the Zn concentration (ppm Zn) in control 2? Report your answer to 4 decimal place.
Please type in the Computer so I can be able to read it.
A student need to prepare four standard solutions by serially diluting a stock solution with concentration 5.0 times 10^-4 N. Standard I will be created by transferring 5.00 mL of the stock solution to the mark with deionized water. The remaining standard solutions (Standards 2 - 4) will be created by transferring 25.00 mL of the previously made standard solution to a 50.00 mL volumetric flask, then...
A student is instructed to determine the concentration of a solution of CoCl2 based on absorption of light (spectrometric/colorimetric method). The student is provided with a 0.10 M solution of CoCl2 with which to prepare standard solutions with concentrations of 0.020 M, 0.040 M, 0.060 Mand 0.080 M (a) Describe the procedure for diluting the 0.10 M solutions to a concentration of 0.020 M using distilled water, a 100 mL volumetric flask, and a pipet or buret. Include specific amounts where...
3. A student repeated the experiment with a different compound, Biomarker X. The equation for the line of best fit from their calibration curve was y = 3.612x104 X+0.0060. If the original concentration of the student's unknown sample of Biomarker X was 8.25x104 M, what is the expected percent transmittance of the diluted unknown sample? Percent Transmittance: Show Your Calculations Below: A. Concentration of Biomarker by Spectrophotometry: Concentration of Stock Biomarker Solution (M): 1.1754 10M **Note: Measure the Percent Transmittance...
Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 M Sr(NO3)2 solution to 150.0 mL. 1.13 M 0.0313 M 0.0199 M 0 0.0501 M 0.0887 M
Preparing Dilute Solutions C1 V1 C2 V2 C1 is the concentration of the original concentrated solution V1 is the volume of the original concentrated solution C2 is the concentration of the final dilute solution V2 is the volume of the final dilute solution A common solution unit is mol/L which can also be written as M. A solution that is 0.1 M NAOH has 0.1 moles Na OH for every liter of solution. Beer's Law Calibration Curve A colored solution...
Prelab: Analysis for iron content of a vitamin Answers can only be entered/graded between 2019-11-01 and 2019-11-06 You have been given a jar of red fruit punch and been asked to determine the concentration of red dye in the fruit punch. You obtain a stock solution of this red dye and it has a concentration of 0.00220 M in the lab room, the stock solution is found in the hood). You take 10.0 mL of this stock solution and dilute...
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