Chemistry of Detergents and Surfactants in the Environment
Chemistry ⇒ Environmental Chemistry
Chemistry of Detergents and Surfactants in the Environment starts at 10 and continues till grade 12.
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A river near a city has been found to have high levels of foam and dead fish. What could be a possible cause related to detergents?
Describe one environmental problem caused by the excessive use of detergents in water bodies.
Describe one way to reduce the environmental impact of detergents.
Describe the impact of detergents on wastewater treatment plants.
Describe the role of surfactants in the process of cleaning.
Explain how surfactants help in cleaning oily stains from clothes.
A detergent contains 20% surfactant by mass. If you have 200 g of detergent, how much surfactant is present?
A river near a city has been found to have high levels of foam and dead fish. What could be a possible cause related to detergents?
Which of the following is a benefit of using biodegradable detergents? (1) They are cheaper (2) They break down naturally in the environment (3) They are more effective at cleaning (4) They contain more phosphates
Which of the following is a cationic surfactant commonly used in fabric softeners? (1) Sodium lauryl sulfate (2) Cetyltrimethylammonium bromide (3) Nonylphenol ethoxylate (4) Sodium stearate
Which of the following is a common anionic surfactant used in household detergents? (1) Sodium lauryl sulfate (2) Ammonium chloride (3) Polyethylene glycol (4) Benzalkonium chloride
Which of the following is a disadvantage of using non-biodegradable detergents? (1) They are more expensive (2) They can persist in the environment and cause pollution (3) They clean less effectively (4) They are always colorless
Fill in the blank: Surfactants that carry both positive and negative charges are called __________ surfactants.
Fill in the blank: The ability of a detergent to form foam is called its __________ property.
Fill in the blank: The cleaning action of detergents is mainly due to the formation of __________, which trap dirt and oil.
Fill in the blank: The environmental process where excess nutrients from detergents cause rapid algae growth is called __________.
True or False: All surfactants are harmful to aquatic life.
True or False: Detergents are always biodegradable.
True or False: Non-ionic surfactants do not carry any electrical charge.
True or False: Surfactants are only used in cleaning products.
