Podcast
Questions and Answers
What is the hydrophobic group in a-Dodecyl dimethyl benzyl ammonium chloride?
What is the hydrophobic group in a-Dodecyl dimethyl benzyl ammonium chloride?
- Benzyl
- Dodecyl (correct)
- Dimethyl
- Ammonium
Which type of surfactants do not ionize in solution?
Which type of surfactants do not ionize in solution?
- Cationic Surfactants
- Ester Linked Surfactants
- Anionic Surfactants
- Ether Linked Surfactants (correct)
What is the general formula of Sorbitan fatty acid esters (Spans)?
What is the general formula of Sorbitan fatty acid esters (Spans)?
- R is the hydrophobic group and x is usually halogen
- R-O-CH2- CH2
- R-OH + H2C - CH2 O OH
- R – O – (CH2 CH2 O)n H (correct)
What role do Ether Linked Surfactants play in emulsions?
What role do Ether Linked Surfactants play in emulsions?
How are Sorbitan fatty acid esters prepared?
How are Sorbitan fatty acid esters prepared?
What role does the hydrophilic group play in surfactants?
What role does the hydrophilic group play in surfactants?
Where are non-polar solubilizates dissolved inside the micelle?
Where are non-polar solubilizates dissolved inside the micelle?
What is the term used to describe the process of bringing water-insoluble molecules into aqueous solution by incorporating them into micelles?
What is the term used to describe the process of bringing water-insoluble molecules into aqueous solution by incorporating them into micelles?
In which position within the micelle do water-insoluble compounds containing polar groups orient themselves?
In which position within the micelle do water-insoluble compounds containing polar groups orient themselves?
Which type of drugs are examples of micelle-solubilized drugs according to the text?
Which type of drugs are examples of micelle-solubilized drugs according to the text?
What is the oldest application of solubilization mentioned in the text?
What is the oldest application of solubilization mentioned in the text?
Where does solubilization occur in non-ionic polyoxyethylanated surfactants?
Where does solubilization occur in non-ionic polyoxyethylanated surfactants?
What is the optimal HLB range for a wetting agent to function efficiently?
What is the optimal HLB range for a wetting agent to function efficiently?
Which type of emulsion do ionized surfactants with strong polar groups favor?
Which type of emulsion do ionized surfactants with strong polar groups favor?
What characteristic of nonionic surfactants determines whether they favor O/W or W/O emulsion?
What characteristic of nonionic surfactants determines whether they favor O/W or W/O emulsion?
Which type of emulsion can have greater than 50% disperse phase according to the text?
Which type of emulsion can have greater than 50% disperse phase according to the text?
What do detergents primarily aim to remove?
What do detergents primarily aim to remove?
How do emulsifying agents significantly alter coalescence rates?
How do emulsifying agents significantly alter coalescence rates?
What does a contact angle of 0° signify between a liquid and a solid?
What does a contact angle of 0° signify between a liquid and a solid?
Which equation represents one of the alternative forms of Young’s equation that excludes γS or γSL?
Which equation represents one of the alternative forms of Young’s equation that excludes γS or γSL?
When does the contact angle between a water droplet and a greasy surface result?
When does the contact angle between a water droplet and a greasy surface result?
What happens when a drop of water is placed on a scrupulously clean glass surface?
What happens when a drop of water is placed on a scrupulously clean glass surface?
What does adding an appropriate wetting agent to water cause on a greasy surface?
What does adding an appropriate wetting agent to water cause on a greasy surface?
In which scenario would the spreading coefficient be high on clean glass?
In which scenario would the spreading coefficient be high on clean glass?
What is the process of holding molecules at the surface of a solid called?
What is the process of holding molecules at the surface of a solid called?
Which action of surfactants involves the wetting of both dirt and the surface to be cleaned initially?
Which action of surfactants involves the wetting of both dirt and the surface to be cleaned initially?
How do surfactants exert their antimicrobial activity through adsorption on the cell surface?
How do surfactants exert their antimicrobial activity through adsorption on the cell surface?
In what situation does adsorption on a solid interface occur?
In what situation does adsorption on a solid interface occur?
What is one mechanism through which surfactants may increase the activity of other antibacterial compounds?
What is one mechanism through which surfactants may increase the activity of other antibacterial compounds?
What distinguishes adsorption on a liquid interface from adsorption on a solid interface?
What distinguishes adsorption on a liquid interface from adsorption on a solid interface?
