Soaps and Detergents (HSC SSCE Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What do surfactants do to hydrogen bonds between water molecules?
What do surfactants do to hydrogen bonds between water molecules?
They break them
What type of forces bond the hydrophobic tail of soap to oils and grease?
What type of forces bond the hydrophobic tail of soap to oils and grease?
Dispersion forces
What is the chemical nature of the hydrophilic head in soap molecules?
What is the chemical nature of the hydrophilic head in soap molecules?
A carboxylate ion ()
Why is the amphiphilic nature of soap molecules key to their cleaning power?
Why is the amphiphilic nature of soap molecules key to their cleaning power?
They bridge water and grease
Which property makes cationic detergents useful as disinfectants?
Which property makes cationic detergents useful as disinfectants?
They are biocidal (kill bacteria)
Why are non-ionic detergents ideal for dishwashers?
Why are non-ionic detergents ideal for dishwashers?
They produce low foam
What are the products when a triglyceride reacts with 3 in saponification?
What are the products when a triglyceride reacts with 3 in saponification?
Glycerol + 3 soap molecules
In a micelle, where are the hydrophobic tails and hydrophilic heads positioned?
In a micelle, where are the hydrophobic tails and hydrophilic heads positioned?
Tails inward, heads outward
What concentration of calcium and magnesium ions classifies water as slightly hard?
What concentration of calcium and magnesium ions classifies water as slightly hard?
More than 20 ppm
What forms when soap reacts with calcium ions in hard water?
What forms when soap reacts with calcium ions in hard water?
Insoluble scum