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benzoic acid solubility in water

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Question:What about the following: CH3CH2OH - soluble? CH3(CH2)10CH2OH - not miscible? ethanoic acid - soluble?

Answers:Pretty much any except very long chained molecules of acid will be soluble. Soap is a long chained acid and is soluble. It probably becomes miscible as it gets larger but it may be an arbitrary distinction. CH3CH2OH Ethanol is very soluble.

Question:and is benzoic acid soluble in 2.0 M NAOH? how about in 2.0 M HCL? another question please IS ETHYL 4-AMINOBENOATE soluble in water how about in 2.0 M NAOH?

Answers:Benzoic acid is insoluble in water and soluble in 2.0 M NaOH. It is insoluble in 2.0 M HCl. The reason is that 2.0 M NaOH will react with the acid to form a salt. Salts are ionic compounds and they are readily soluble in water. Adding acid to the 2.0 M NaOH will cause the benzoic acid to gain a proton and become insoluble once again. Ethyl 4-aminobenzoate would be insoluble in water and 2.0 M NaOH, but soluble in 2.0 M HCl because the amino group will accept a proton from the HCl, making a salt.

Question:Why is Benzoic acid somewhat soluble in water?

Answers:benzoic acid is nearly insoluble in cold water but sufficiently soluble in hot water .....this is because non-polar hydrocarbon part outweighs the effect of polar -COOH part as non polar part is hydrophobic ...so no hydrogen bonding takes place in cold water and it is insoluble..... only aliphatic carboxylic acids having upto 4 carbon atoms are miscible in water due to the formation of hydrogen bonds but in hot water thermodynamics comes into play now as Gibbs energy is related to entropy change as (deltaG)=deltaH-T(deltaS) now as dissolution of benzoic acid crystal in water is an exothermic process so delta H is negative... now delta S is positive as solid is changing into liquid... so if we increase the temperature the overall gibb's energy change will be more negative and thus spontaneity of reaction increases and hence solubility increases....

Question:When both water and diethyl ether were added to benzoic acid, which layer(ie the organic or aqueous layer) can the benzoic acid can be found. i am also curious that if benzoic acid is more soluble in diethyl ether, is it due to the 6 carbon chain of the benzoic acid? C6H5coo- soluble in water?

Answers:Benzoic acid is more soluble in diethyl ether than water. So benzoic acid would be in the organic layer. Bear in mind that ether is less dense than water, so the extract would be on top. Benzoic acid is more soluble in ether because the benzene ring is nonpolar, aye. Benzoate salts are water soluble, though, because water is better able to stabilize the negative charge on the oxygen.