When synthesizing n-butyl bromide by allowing n-butyl alcohol to rect with sodium bromide and sulfuric acid what are the formulas for the salts that may precip. when the reaction mixture is cooled?
CH3CH2CH2CH2OH + NaBr --> CH3CH2CH2CH2Br + NaOH.
NaOH would react with H2SO4 to form Na2SO4 which may precipitate in a mixture of organic solvents.
to form crystals
When n-butyl alcohol reacts with sodium bromide and sulfuric acid to synthesize n-butyl bromide, several salts may precipitate out of the reaction mixture when it is cooled. These salts can be identified by their formulas:
1. Sodium sulfate (Na2SO4): When sulfuric acid (H2SO4) reacts with sodium bromide (NaBr), sodium sulfate can precipitate as a byproduct if there is an excess of sulfuric acid in the reaction.
2. Sodium hydrogen sulfate (NaHSO4): If there is an insufficient amount of sulfuric acid in the reaction, sodium hydrogen sulfate may precipitate instead of sodium sulfate.
It is important to note that the formation of these salts depends on the stoichiometry of the reaction and the presence of any impurities in the starting materials.
To determine the formulas for the salts that may precipitate when the reaction mixture is cooled, we need to consider the reaction between n-butyl alcohol, sodium bromide, and sulfuric acid.
The reaction can be represented as follows:
n-butyl alcohol + sodium bromide + sulfuric acid → n-butyl bromide + sodium sulfate + water
In this reaction, n-butyl alcohol is reacting with sodium bromide and sulfuric acid to produce n-butyl bromide, sodium sulfate, and water.
Now, to identify the salts that may precipitate when the reaction mixture is cooled, we need to look at the solubility rules. Here are some general rules to consider:
1. Most sodium salts are soluble and do not form precipitates.
2. Most bromides are soluble except for those of silver, lead(II), and mercury(II).
3. Sulfates are generally soluble, but there are exceptions for salts containing lead(II), barium, and calcium.
Based on these solubility rules, sodium bromide (NaBr) and sodium sulfate (Na2SO4) are both soluble in water and will not precipitate. Therefore, there are no salts that are expected to precipitate when the reaction mixture is cooled.
Please note that this is a general explanation based on solubility rules, and specific conditions or other factors may influence the formation of precipitates. It is always recommended to consult authoritative sources or perform experimental tests to confirm the results.