Podcast
Questions and Answers
Why do amphipathic molecules like soaps and detergents aggregate in water?
Why do amphipathic molecules like soaps and detergents aggregate in water?
- To hide their hydrophilic parts from water and expose the hydrophobic parts to water
- To prevent any interaction with water molecules
- To expose their hydrophilic parts to water and remove the hydrophobic parts from water (correct)
- To maintain a balance between their hydrophilic and hydrophobic parts in water
Which type of solution has a pH value of less than 7 according to the text?
Which type of solution has a pH value of less than 7 according to the text?
- Basic solution
- Pure water
- Acidic solution (correct)
- Neutral solution
What is the role of acids in modifying the concentration of H+ ions in a solution?
What is the role of acids in modifying the concentration of H+ ions in a solution?
- Stabilize the H+ concentration
- Have no effect on the H+ concentration
- Decrease the H+ concentration
- Increase the H+ concentration (correct)
In what type of solution do hydrophobic substances tend to aggregate?
In what type of solution do hydrophobic substances tend to aggregate?
How is the pH of a solution defined?
How is the pH of a solution defined?
Which type of molecule forms micelles in water when placed in it?
Which type of molecule forms micelles in water when placed in it?
What type of substances dissolve readily in water?
What type of substances dissolve readily in water?
What happens when water cannot interact favorably with a molecule?
What happens when water cannot interact favorably with a molecule?
What is the term used for molecules with significantly hydrophilic and hydrophobic parts?
What is the term used for molecules with significantly hydrophilic and hydrophobic parts?
Why do hydrophobic molecules not dissolve well in water?
Why do hydrophobic molecules not dissolve well in water?
Which type of regions on a protein's surface attract water molecules?
Which type of regions on a protein's surface attract water molecules?
What kind of interactions are responsible for the dissolving of hydrophilic substances in water?
What kind of interactions are responsible for the dissolving of hydrophilic substances in water?
Why do oil molecules repel water?
Why do oil molecules repel water?
Which term describes a stable suspension of fine particles in a liquid?
Which term describes a stable suspension of fine particles in a liquid?
What type of substances have an affinity for water?
What type of substances have an affinity for water?
Why do hydrophobic molecules not dissolve in water easily?
Why do hydrophobic molecules not dissolve in water easily?
What characteristic of a substance makes it hydrophilic?
What characteristic of a substance makes it hydrophilic?
Which property allows water to dissolve many salts and polar molecules?
Which property allows water to dissolve many salts and polar molecules?
Why does ice float in liquid water?
Why does ice float in liquid water?
What property of water helps stabilize temperatures in organisms and bodies of water through evaporative cooling?
What property of water helps stabilize temperatures in organisms and bodies of water through evaporative cooling?
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