Which of the following is NOT a factor that influences the melting point range of a...
When performing a melting point on a solid compound, 2 melting point determinations were made. One sample, which was 1 mm in height in the capillary, possessed a melting point of 150-151°C. The other sample was 25 mm in height. What would you expect the approximate melting point to be for this 25 mm sample, if the heating rate for both samples was 2 degrees per minute? (Hint: use algebra to solve the mp range) 4.
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
Compound X has just been successfully synthesized. Crystals of the crude product had a melting point range of 120 - 130 °C. After recrystalization, the new melting point range was 124.5 - 125.5 °C. Which sample was more pure, the crude product or recrystallized product? Why?
Why will your melting range be too broad on the high end of the melting point range if you heat the sample too quickly?
1. You are conducting a melting-point determination to identify a compound whose handbook melting-point range is 112 - 114 °C. Comment on the purity of the sample, and the possible identity of the substance, when your experimental melting-point range is : A. 114 -116 °C B. 94 - 102 °C I would C. 102 - 103 °C
Which of the following statements correctly describe melting and melting point? Select all that apply. Check all that apply. The temperature of a solid rises steadily during the melting process. At the melting point of a substance the solid and liquid phases are in equilibrium Pressure changes have little effect on the melting point of a substance. During melting the kinetic energy of the particles increases dramatically
True/False When determining a melting point, it is desirable to use as much material as possible, thus ensuring that you can observe a true equilibrium between solid and liquid phases. True/False Although a preliminary melting point can be done quickly to get an estimate of the approximate melting range, a sharp and accurate melting point value requires heating no faster than 1o – 2o per minute. True/False If you wish to repeat a melting point experiment, it is desirable to...
Which of the melting point capillaries in the picture below is filled to the proper level for taking a melting point on a MelTemp melting point apparatus? لالالالالالالالالال الارا 01489 CC A OD B
Use the following data to answer 2 through 5: Temperature solid starts melting 69.5 C Temperature solid ends melting 70.0 C 2. The melting point of the unknown solid is ________. 3.The identity of the unknown solid is ________. 4.The range for the previous solid is ________. 5. Based on the range, we can conclude the sample is ________.