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What is the melting point of benzoic acid?
the melting/ freezing point is approximately 50°C
Who will melt earlier benzoic acid or sodium chloride?
sodium chloride melt earlier because it has low freezing point
Why we use paraffin for determination of melting point?
Paraffin is a commonly used material for determining the melting point of organic compounds because it has a well-defined melting point of 54-57°C and does not react with most organic compounds. This makes it a suitable medium for accurately measuring the melting points of various substances without interference.
In the experiment of determining melting point why each time fresh paraffin liquid should be taken?
Each time fresh paraffin liquid should be taken in the experiment of determining melting point to ensure accurate and consistent results. Reusing the same sample may introduce impurities or contaminants, leading to inaccurate melting point measurements. Using fresh paraffin liquid each time helps to eliminate any potential variables that could affect the melting point determination.
What is the melting point of fifty percent 2-naphthol and fifty percent benzoic acid?
The melting point of a mixture of 50% 2-naphthol and 50% benzoic acid will depend on the exact proportion of each compound present and any potential interactions between them. However, the melting points of the individual compounds are approximately 122°C for 2-naphthol and 122-123°C for benzoic acid.
Is the melting paraffin physical or chemical change?
physical change
Why does benzoic acid has high melting point?
Benzoic acid has a high melting point because it forms strong intermolecular hydrogen bonds between its molecules. These bonds require a lot of energy to break, resulting in a high melting point. Additionally, benzoic acid molecules are relatively large and exhibit a high degree of symmetry, contributing to its strong intermolecular forces.
Why benzoic acid unmelt even 200 Celsius?
Benzoic Acid has a melting point of 122oC. If your sample did not melt even at 200oC, then you can only assume that the sample in Whole or Part was not Benzoic Acid. It must have been contaminated with some other compound with a much higher melting point.
What is the melting point of benzoic acid?
the melting/ freezing point is approximately 50°C
A student recrystallized some impure benzoic acid and isolated it by filtration. He scraped the purified benzoic acid off the filter paper after it had dried and took the melting point as a test for p?
The student's approach to isolating and testing the purity of benzoic acid is appropriate, as recrystallization is a common method for purifying solids. After scraping the dried benzoic acid from the filter paper, taking the melting point is a valid method for assessing purity; pure substances have a sharp melting point range, while impurities typically depress and broaden this range. If the observed melting point of the recrystallized benzoic acid closely matches the literature value for pure benzoic acid, it suggests successful purification. Conversely, a significant deviation would indicate the presence of impurities.
Who will melt earlier benzoic acid or sodium chloride?
sodium chloride melt earlier because it has low freezing point
Why we use paraffin for determination of melting point?
Paraffin is a commonly used material for determining the melting point of organic compounds because it has a well-defined melting point of 54-57°C and does not react with most organic compounds. This makes it a suitable medium for accurately measuring the melting points of various substances without interference.
In the experiment of determining melting point why each time fresh paraffin liquid should be taken?
Each time fresh paraffin liquid should be taken in the experiment of determining melting point to ensure accurate and consistent results. Reusing the same sample may introduce impurities or contaminants, leading to inaccurate melting point measurements. Using fresh paraffin liquid each time helps to eliminate any potential variables that could affect the melting point determination.
Is it possible to reuse paraffin wax?
Yes, it is possible to reuse paraffin wax by melting it down and filtering out any impurities before using it again.
What is the melting point of fifty percent 2-naphthol and fifty percent benzoic acid?
The melting point of a mixture of 50% 2-naphthol and 50% benzoic acid will depend on the exact proportion of each compound present and any potential interactions between them. However, the melting points of the individual compounds are approximately 122°C for 2-naphthol and 122-123°C for benzoic acid.
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.
What happens to Benzoic acid on heating?
Benzoic acid sublimes and transforms directly from a solid to a gas when heated without melting. This process is driven by the compound's low vapor pressure and is commonly used for purification purposes.
