1. Why is diethyl ether a good choice for an organic solvent?

2. Why doesn’t the neutral organic compound dissolve in 1.5 M sodium hydroxide solution?

1. It has a low boiling point and is easily removed from the solute.

1. It has a medium polarity and so dissolves a wide range of organic compounds.
1. It is relatively unreactive so can be used to extract compounds from a wide pH range in extractions.
1. It is has a low density and so is easily separated from aqueous solutions.
1. It is can be easily dried by a range of materials depending on just how dry the solvent needs to be. Drying agents range from simple inorganics life magnesium sulfate, to much more reactive drying agents like sodium wire and lithium aluminium hydride.
1. It is used as a solvent for many reactions, especially organometallic reactions as ether forms a complex with the metallic reagent. The use of ether can mean that the reaction product can be recovered with the minimum of manipulations.

2. I have no idea what the neutral organic compound is.

1. Diethyl ether is a good choice for an organic solvent for several reasons:

- Low boiling point: Diethyl ether has a boiling point of about 34.6°C, which makes it easy to evaporate once the desired process is complete. This allows for easy separation of the organic compounds from the solvent.
- High solvating power: Diethyl ether has a high ability to dissolve a wide range of organic compounds. It can dissolve polar and non-polar compounds, making it versatile for various reactions and extractions.
- Inertness: Diethyl ether is relatively inert towards many common chemicals, which means it does not react with the compounds being dissolved. This is important to maintain the integrity of the organic compounds being handled.
- Readily available: Diethyl ether is commercially available and relatively inexpensive, making it a popular choice as an organic solvent.

2. A neutral organic compound may not dissolve in a 1.5 M sodium hydroxide solution due to several reasons:

- Incompatibility: Some organic compounds may not dissolve in sodium hydroxide due to incompatibility or lack of solubility. Sodium hydroxide is a strongly basic solution and may not interact well with certain organic compounds.
- Solubility characteristics: The solubility of organic compounds in a particular solvent depends on their polarity. If the organic compound is non-polar, it may not dissolve well in a strongly polar sodium hydroxide solution.
- Reaction with sodium hydroxide: Some organic compounds may undergo chemical reactions with sodium hydroxide instead of dissolving. This can result in the formation of new compounds that are insoluble in the solution.
- pH considerations: The solubility of organic compounds can also be affected by the pH of the solution. If the organic compound is sensitive to pH or undergoes pH-dependent changes, it may not dissolve in a 1.5 M sodium hydroxide solution.

To investigate the reason why a neutral organic compound does not dissolve in a 1.5 M sodium hydroxide solution, you can try testing its solubility in different solvents with varying polarities, or consider the possibility of it undergoing a chemical reaction with the sodium hydroxide.