Ethanol and Water Interactions

The video explores the solubility of ethanol (C2H5OH) in water, emphasizing its polar nature and small molecular size, which contribute to its solubility. Ethanol's structure, with a polar OH group, allows it to interact with water molecules, forming weak bonds. The video also discusses how increasing the carbon chain length decreases solubility, as water molecules struggle to surround larger molecules. The video concludes with a summary of ethanol's solubility properties.

What is the chemical formula for ethanol?

• C4H9OH

• C3H7OH

• CH3OH

• C2H5OH

Why is ethanol soluble in water?

• Because it is a gas at room temperature

• Because it is a polar and small molecule

• Because it is a large molecule

• Because it is a non-polar molecule

What makes the oxygen in ethanol slightly negative?

• Its large atomic size

• Its ability to form hydrogen bonds

• Its low electronegativity compared to other elements

• Its high electronegativity compared to other elements

How do water molecules interact with ethanol?

• They form covalent bonds

• Water molecules surround ethanol due to polarity

• They do not interact

• They repel each other

What happens when water molecules surround ethanol?

• Ethanol dissolves in water

• Ethanol becomes insoluble

• Ethanol evaporates

• Ethanol forms a solid

What effect does adding more carbon atoms have on ethanol's solubility?

• Decreases solubility

• Increases solubility

• Makes it a gas

• Has no effect

At what point does ethanol become insoluble in water?

• When it has three carbon atoms

• When it has two carbon atoms

• When it is heated

• When it has enough carbon atoms that water cannot surround it

Why can't water dissolve ethanol with many carbon atoms?

• Water molecules are non-polar

• Water molecules evaporate quickly

• Water molecules can't surround the entire molecule

• Water molecules are too small

What is the main reason ethanol is soluble in water?

• Its non-polar nature

• Its gaseous state

• Its large size

• Its polar nature and small size

Who is the narrator of the video?

• Dr. A

• Dr. B

• Dr. D

• Dr. C