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please help answer my homework.. tnx. please help answer my homework.. tnx.
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Why must you allow the oil bath to cool between melting point determinations?
Allowing the oil bath to cool between melting point determinations ensures that the temperature is accurately controlled for each sample. This prevents overheating or fluctuations in temperature, which can impact the accuracy of the melting point determination. Cooling also gives the apparatus time to equilibrate, ensuring consistent and reliable results.
Why is it misleading to identify a solid compound just from a lone melting determination?
Identifying a compound based solely on its melting point is misleading because different compounds can have the same melting point. Additional tests, such as spectroscopic analysis or chromatography, are required to accurately determine the compound's identity. A single melting point determination is not sufficient as it could lead to a wrong conclusion about the compound present.
How can melting point and boiling point determination be used in identifying and or characterizing unknown compounds?
Melting point and boiling point determination can help in identifying unknown compounds by comparing the experimental values with known values in databases. A match can indicate the compound's identity. Additionally, the range of melting point and boiling point can provide information on the purity and molecular structure of the compound.
Why is the melting point determination not used to find the melting point of inorganic compounds?
Melting point determination is not commonly used for inorganic compounds because many inorganic compounds have high melting points that are difficult to determine accurately using conventional methods, which can involve significant heating requirements and specialized equipment. Inorganic compounds can also have complex melting behavior, such as decomposition or phase transitions, that make determination of a precise melting point challenging. Analytical techniques like differential scanning calorimetry or thermogravimetric analysis are often more suitable for studying the thermal properties of inorganic compounds.
What is difference between melting point and drop melting point?
The melting point is the temperature at which a solid substance transitions to a liquid state. The drop melting point is a method of determining the melting point where a small amount of the substance is heated until it melts and then allowed to drop onto a solid surface to observe the melting point. Drop melting point is often used when the substance being tested has a high melting point or when observing the melting process is critical.
Why should samples for melting point determination be finely powdered?
Samples should be finely powdered for melting point determination to ensure uniform heating and accurate results. Fine powder allows for even distribution of heat throughout the sample, leading to consistent melting behavior and precise measurement of the melting point. Unevenly sized particles can result in inaccurate readings and can affect the repeatability of the experiment.
Why liquid paraffin used for determination of melting point?
Liquid paraffin is used in the determination of melting point because it has a known and consistent melting point of around 40-60°C. This allows for a reliable reference point to calibrate and set the temperature of the melting point apparatus before testing other substances. Liquid paraffin also has a low volatility, ensuring that it remains stable throughout the duration of the experiment.
Why paraffin used for determination of melting point?
i dont know asked some one else to asked
Why do you use a new capillary tube for melting point determination each time?
It is not easy to be cleaned inside.
What happens during the slow melting point determination?
During slow melting point determination, a solid sample is gradually heated and observed for the temperature range over which it transitions from solid to liquid. This process allows for a more precise measurement of the melting point, as it provides time for the sample to reach thermal equilibrium. The melting point is recorded when the first drop of liquid is observed until the entire sample is melted. This method is useful for assessing the purity of a substance, as pure compounds have sharp melting points, while impure samples tend to have broader melting ranges.
How can you differentiate between organic compounds having same melting point using melting point?
you dont.
What is the melting point of lard?
The melting point of lard is typically between 86-113F (30-45C).
