Answer:
Because ethyl alcohol is miscible in water
Explanation:
Ethyl alcohol (or ethanol) has a polar group, -OH, so it has strong interactions with another polar compounds, such as water. This is why ethanol is miscible in water. In an extraction, the idea is for the solute to move from one solution to another, with clear, different phases. When we add ethanol to water, there's still only one phase.
A non-polar solvent, such as an ether, would be a better choice to use with water in an extraction.
