Macroscale and Microscale Organic Experiments
7th Edition
ISBN: 9781305577190
Author: Kenneth L. Williamson, Katherine M. Masters
Publisher: Brooks Cole
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Question
Chapter 3, Problem 3Q
Interpretation Introduction
Interpretation:
The proof that the test tubes contain three different chemical compounds should be given. Also, the minimumnumber of melting points needed to proof that should be determined.
Concept introduction:
Temperature at which an element changes from the solid state to the liquid state is known as melting point or sometimes liquefaction point. At the melting point, both solid and liquid phase coexist in equilibrium. It depends on the pressure and is normally defined at the standard pressure
Mixed melting point is a techniquethat is used to identify chemical compounds. It is used when a substance of known identity and melting point is mixed with another unknown substance to calculate its melting point.
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Chapter 3 Solutions
Macroscale and Microscale Organic Experiments
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Similar questions
- Water rises in a glass capillary tube to a height of 17 cm. What is the diameter of the capillary tube?arrow_forwardRank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on.arrow_forwardTwo samples have exacted the 1 point same melting points, so the samples are: If the mixture has the same melting point of the two samples then the compounds identical to each other (Same compounds). The same intermolecular forces. The same structure Different to each other's.arrow_forward
- What would you do to cause a substance to change from a solid phase to a liquid phase at constant temperature?arrow_forward1. Non-volatile impurities usually decrease the boiling point of the liquid due to a decrease in the vapor pressure. TRUe or FALSE 2. What is the melting point in (degree Celsius)of a crystalline substance that melts at a temperature range of 119 to 125 degrees Celsius?arrow_forwardChemistry 5. You melt the substance and de-coloration occurs. Unfortunately, you weren’t paying attention and miss the melting point. Should you start over or re-melt it? Or both are options ‘okay’? 6. When measuring the melting point of a substance, it suddenly disappears. What has happened? Can you still measure the melting point? If so, how? 7. We should not re-use a sample in a capillary tube for melting point measurement. Why not? 8. It takes significant amount of time for the melting point apparatus to cool down before next measurement if your new sample has a lower melting point than your previous one. What can you do to reduce this time in between measurements when many samples of different melting points are used?arrow_forward
- What are liquid crystals ? explain its typesarrow_forwardExplain the permanent dipoles ?arrow_forwardConstant Pressure Transitions 1. Suppose you had the following phase diagram for a simple pure substance: a. What physical state would the substance be in under the conditions at point 1? b. Suppose the temperature was then increased on this substance at constant pressure. What state(s) would the substance be in at each of points 2 to 5? c. Suppose the constant pressure was 1 atmosphere. What useful information can you get from the diagram about the simple physical properties of the substance? d. Suppose at a much lower pressure, the substance was under the conditions at point 6. Describe what happens to the substance as you increase the temperature from point 6 to point 8.arrow_forward
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