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Why 4 hydroxy benzoic acid is less acidic than 2 hydroxy benzoic acid?
as because in 2-hydroxy benzoic acid, there is a possibility of H-bonding which makes the dissociated ion stable and will not combine with H+ ion leaving it free, while it is not so in case of 4-hydroxy benzoic acid.
Why is it necessary to filter the benzoic acid solution while hot?
At low temperature it has poor solubility and would crystallize out
Why urea has sharp melting point but glass does not?
Urea is a pure crystalline compound so has a sharp melting point while glass is an amorphous mixture.
What time is it in Bulgaria at 8am EST?
It would be 3pm, while you observe 8am in the EST.
How does salt raises the melting point of water?
It doesn't increase the melting point of ice, instead, it lowers it. When a solute (which is the salt) is added to a solvent (which is what dissolves it), the boiling point is increased while both the freezing and melting points are decreased. This is evident in the boiling point elevation and the freezing/melting point depression system.
Why paraffin oil used in instrument while knowing melting point of benzoic acid?
It doesn't decolourize on heating and go to a temperature of 240
Why is the sodium benzoate easily extracted into H20 while the original benzoic acid is not easily extracted into H20?
Because sodium benzoate is a salt and is soluble in water while benzoic acid is insoluble.
What did you observe while benzic acid-salt mixture is melting?
ewan ko uy.. ako na nga nag tatanong.. sagutin niyo naman..
Why 4 hydroxy benzoic acid is less acidic than 2 hydroxy benzoic acid?
as because in 2-hydroxy benzoic acid, there is a possibility of H-bonding which makes the dissociated ion stable and will not combine with H+ ion leaving it free, while it is not so in case of 4-hydroxy benzoic acid.
What would happen to the melting point of pure benzoic acid if 2-naphthol was mixed in?
The literature value of the melting point of pure benzoic acid is about 122.4 degrees Celsius, while the literature value of the melting point of pure 2-naphthol is close at 122 degrees Celsius. Nevertheless, the melting point of the benzoic acid should be depressed (go down) compared to the literature value if you were to add 2-naphthol because the sample you were testing would then be impure, even if that impurity does have a similar melting point. Also, the range over which the sample melts should get larger as well. Instead of melting within a degree or less, it may melt over the course of several degrees. So I just tested this in lab, and I can't promise that this is 50/50, but my melting point for 2-naphthol with Benzoic acid is 104.1-106.0 degrees Celsius This is a very basic answer, and the trend is true. However, with my organic chemistry professor, this answer would be followed by a blank look and "Why?" The best way to think of this is to look at the chemical structure of Benzoic Acid and 2-naphthol separate. Go ahead and Google it on a new tab. Now look at the molecule of the two together. And think: "What does the composite molecule have that the two alone don't?" Give up? Electronegativity. The more electronegative a molecule is the greater its reactivity. As in the compound molecule will melt easier than the two 'pure' substances.
Why is benzonitrile is liquid at room temperature while benzoic acid is a solid at room temperature?
Chemicals have their own intrinsic properties and melting point is one of them. Carboxylic acids tend to raise the melting point of substances as compared to their nitrile kin by increasing the polar interactions between like molecules. These interactions require greater energy to overcome to achieve the liquid state, which to the observer shows up as higher melting points. It just happens that room temperature falls between when benzonitrile melts and when benzoic acid melts.
Does benzoic acid have an odor?
Acetic acid is an aliphatic (fatty) acid and a liquid while benzoic acid is an aromatic acid which exists in solid state.
Why is it necessary to filter the benzoic acid while hot?
because it will form solid when cool
Is benzoic acid or sucrose more soluble in water?
Benzoic acid solubilty in water at room temperature: 2,9 g/L. Sugar solubilty in water at room temperature: 2000 g/L.
What is a good name for chocolate melting?
melting chocolate is a good name. it depends if you are talking about what it is called after melting or while it is melting.
Why is it necessary to filter the benzoic acid solution while hot?
At low temperature it has poor solubility and would crystallize out
Why is benzoic acid is in molecular form at pH of 2?
Benzoic acid is a weak acid, which means that its dissociation is reversible. C6H5COOH -----> C6H5COO- + H+ At pH 2, there are a lot of H+ ions in the solution. According to Le Chatelier's Principle, the equilibrium will shift to the left to favor the opposite reaction where Benzoic acid is produced, to reduce the amount of H+ in the solution. Therefore, an insignificant amount of benzoic acid will dissociate, while most of it remains in the molecular form.
