Which method is commonly used to separate particles from a heterogeneous mixture after coagulation has taken place?
Filtration
Coagulation is the process in which very fine suspended particles, which would otherwise stay dispersed, are made to clump together into larger particles (flocs), for example by adding alum to muddy water. Once the particles are coagulated, the mixture is a heterogeneous mixture of a liquid and solid lumps.
Filtration passes this mixture through a porous medium such as filter paper or a sand bed. The liquid passes through, while the coagulated particles, now too large to pass the pores, are held back. In this way the solid particles are separated completely from the liquid; this is why, in water treatment, coagulation and settling are followed by filtration.
Decantation can pour off the clearer liquid after the flocs settle, but light flocs and fine particles left in suspension are not fully removed, so filtration is the method that separates the coagulated particles completely.
Distillation and evaporation work by boiling off or vaporising a liquid; they are used to separate dissolved substances or liquids with different boiling points, not to remove suspended solid particles from a mixture.
Hence, Filtration.
Similar Questions
Which of the following is the best example of a heterogeneous mixture?
A chemist wants to separate a mixture of sand and muddy water. She uses a filter paper and a funnel to accomplish this. Based on the properties of suspensions, which statement is correct why this method is effective?
Which method is commonly used to separate a mixture of two miscible liquids with different boiling points?
Which of the following element symbols is incorrect?
In a chemical reaction, 50 grams of calcium carbonate is heated to produce 28 grams of calcium oxide and an unknown mass of carbon dioxide. According to the law of conservation of mass, what is the mass of carbon dioxide produced?
Which of the following best describes a homogeneous mixture?
If a reaction occurs in an open flask and the observed mass decreases, which explanation best fits with the Law of Conservation of Mass?
What is the correct chemical formula for calcium phosphate, given that calcium has a valency of 2 and phosphate has a valency of 3?
A student is given a mixture of sand, salt, and water. Which sequence of steps would best separate all components to obtain pure sand and pure salt?
Which of the following is most likely to dissolve completely in water at room temperature?
Important Questions from Basic Concepts of Chemistry
Which of the following pair is correct?
I. Isotopes – different mass numbers
II. Isobars – different atomic numbers
Which of the following is a zone of a flame?
I. Dark
II. Luminous
III. Non-Luminous
If formula of sodium salt of an anion X is \(Na_2X\) , then the formula of its aluminium salt would be
Which of the following set contains same number of molecules?
A. 1 gram O 2, 2 grams SO 2
B. 1 gram CO 2, 1 gram N 2O
C. 1 gram O 2, 1 gram O 3
The volume of CO 2liberated at STP when 10 gm of 90% pure limestone strongly heated is
