Soap and Detergent Manufacture
Chemistry ⇒ Industrial Chemistry
Soap and Detergent Manufacture starts at 11 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Soap and Detergent Manufacture.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 12
A detergent sample contains 20% sodium alkylbenzene sulfonate by mass. If you have 250 g of the detergent, how many grams of sodium alkylbenzene sulfonate are present?
A soap manufacturer uses 100 kg of coconut oil (average molar mass = 200 g/mol) and reacts it with excess NaOH. Calculate the number of moles of coconut oil used.
Calculate the mass of sodium hydroxide required to completely saponify 10 g of pure stearic acid (C17H35COOH). (Molar mass of stearic acid = 284 g/mol, NaOH = 40 g/mol)
Describe the difference between a soap and a detergent in terms of their chemical structure and cleaning action.
Describe the process of 'salting out' in soap manufacture.
Describe the role of surfactants in detergents.
Describe the role of temperature in the saponification process.
Explain the environmental impact of phosphates in detergents.
Explain the term 'biodegradable detergent'.
Explain why non-ionic detergents are often used in dishwashing liquids.
Explain why soap is not suitable for washing woolen clothes.
Explain why soaps are less effective in hard water.
Explain why synthetic detergents are preferred over soaps in hard water areas.
Name two environmental concerns associated with the use of synthetic detergents.
State the role of builders in detergent formulations.
What is the main chemical reaction involved in the manufacture of soap?
