telting Point Measurement and Correction Approximate melting point of unknown compound: 85 - 96 °C Select an appropriate melting point standard with a melting point closest to the approximate melting point of your unknown compound. Choose the standard: A. 98 - 100 °C Choose... B. 160 – 162 °c C. 252 - 254 °c Measured absolute melting point of the standard: 96 - 98 °C Measured absolute melting point of the unknown compound: 90 – 94 °C Compare the reported and experimental melting points of the standard to determine if any corrections need be done for your unknown melting point. Correction (°C):

telting Point Measurement and Correction Approximate melting point of unknown compound: 85 - 96 °C Select an appropriate melting point standard with a melting point closest to the approximate melting point of your unknown compound. Choose the standard: A. 98 - 100 °C Choose... B. 160 – 162 °c C. 252 - 254 °c Measured absolute melting point of the standard: 96 - 98 °C Measured absolute melting point of the unknown compound: 90 – 94 °C Compare the reported and experimental melting points of the standard to determine if any corrections need be done for your unknown melting point. Correction (°C):

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Weigh out accurately 9.99 g of copper(II) sulfate pentahydrate (CuSO4·5H2O) by taring using a clean and dry empty 250-ml beaker. 2. Add tap water to the beaker to reach the 50-mL mark on the side of the beaker. 3. Dissolve all the crystals of CuSO4·5H2O in the water using a clean glass rod for stirring. 4. Then using a glass funnel transfer all the blue solution to a 100-mL volumetric flask. Rinse the beaker with about 10 mL of water and transfer the solution to the volumetric flask. Repeat the rinsing of the beaker with another 10 mL of water and transfer the solution to the volumetric flask. This is called quantitative transfer of the solution. 5. Then add enough water to reach the calibration mark of the volumetric flask. (You will need to use a dropper to add the last few drops of water to ensure the meniscus is on the calibration mark). Close the volumetric flask with a stopper and mix the solution well (so that it is homogeneous). 6. You have now prepared a standard solution (or…
Characteristics of a substance that can be separated from a mixture through steam distillation
Which would be the best way to determine the melting point of a compound? Why? Slowly run two very precise melting points. Run a very precise melting point and then run a fast one to double check your work. Run a quick melting point for an approximate melting range, then a slow precise one.
In a lab investigation, a student is asked to crush and measure 1 g of sulfur from a larger solid block. The student understands that although the mass of the sample is changing, the melting point will remain the same because he/she knows that ___.
What is the mass % of isopentyl acetate given the following information. Rx = 0.725 %3D Area of Isopentyl acetate peak = 212 Area of Isopentyl alcohol peak = 118 Report your answer to 1 decimal place.
The literature value for the melting point of your product was 144-146 °C. Below is the data for 4 students, which student had the purest crystals AND the correct product. Student A: melting point range of 141-142 °C Student B: melting point range of 138-146 °C Student C: melting point range of 150-151 °C Student D: melting point range of 139-143 °C O OB O A O с D
Consider the following molecules. Which statement(s) is TRUE? CH3 CH3 но ČH3 но ČD3 i. You could differentiate between the two with a spot test. ii. You could differentiate between the two with liquid chromatography. iii. You could differentiate between the two with TLC. iv. You could differentiate between the two with a microcrystalline test. O a. i and iv only O b. ii and iii only O c. iii only O d. i only e. Neither i, ii, iii, nor iv are correct statements.
Chemistry
Question 1. a) You think that you have isolated a substance A in the lab. It melts at 75 – 77C. Since you don’t totally trust your own laboratory techniques, you wish to prove that you have substance A. Using only melting point techniques, explain how you can prove that you actually have this substance. b) List and explain how solubility is a factor throughout crystallization/recrystallization. c)Explain aspects of melting point as it is related to substance identityand substance purity
Above is a fractional distillation set up. Name five things wrong with the set up.
A nursing floor requires half liter of 50% isopropyl alcohol. How many millimeters of 70% isopropyl alcohol will be needed for compounding this order?
What are the functions of the graduated cylinder and distillate in a distillation set-up?