If a student extracts first with NaOH then with NaHCO3, what will be the result?

Doesn't that have something to do with what is being treated?

well the compounds being used are benzoic acid, p-tertbutylphenol and p-dimethoxybenzene!!

I think doing so would extract p-tertbutylphenol first and then benzoic acid because it NaOH is a strong base so it reacts with weak acid first ?? Is that correct?

I think a strong base will react with BOTH the weak acid and the strong acid.

http://www.chem.ucla.edu/~bacher/Specialtopics/extraction.html

I think you should extract first with NaHCO3, which will remove the benzoic acid but not the phenol. Then extract with the NaHCO3.

If you extract with NaOH first, you form a salt with both the phenol AND the benzoic acid. When you acidify the extract, both benzoic acid and the phenol appear as a mixture. This would separate from the neutral compound, however.

When a student performs an extraction with NaOH (sodium hydroxide) followed by NaHCO3 (sodium bicarbonate), the result will depend on the nature of the substances being extracted.

Generally, this type of sequential extraction is used to separate and purify a mixture of organic compounds. NaOH is a strong base, and it is commonly utilized to extract acidic compounds from the mixture. During this extraction, acidic compounds form water-soluble salts (i.e., they react with NaOH to produce water-soluble sodium salts).

After the first extraction with NaOH, the aqueous layer will contain water-soluble acidic compounds in the form of sodium salts. The organic layer will contain neutral and non-acidic organic compounds.

Next, the organic layer is subjected to an extraction with NaHCO3, which is a mild base. This extraction is typically performed to remove any residual acidic compounds that were not fully extracted in the previous step. With NaHCO3, acidic compounds that are phenols, carboxylic acids, or acidic amides react to form water-soluble sodium salts, while neutral and non-acidic organic compounds remain in the organic layer.

The final result of the extraction with NaHCO3 is an aqueous layer containing water-soluble acidic compounds as sodium salts, while the organic layer contains the purified, neutral, and non-acidic organic compounds.

It's important to note that the specific result will depend on the composition of the original mixture and the properties of the compounds present. The choice of NaOH and NaHCO3 as extracting agents is based on their ability to selectively react with acidic compounds while leaving neutral compounds unaffected.