Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

Which method we can apply to seperate water and mercury  and why
Asked by Nimmi | 01 Jul, 2018, 10:19: PM
answered-by-expert Expert Answer
Removing mercury from the water can be achieved using four processes: Coagulation/Filtration, Granular Activated Carbon, Lime Softening, and Reverse Osmosis.
 
Mercury can be removed from water by using four processes:

1) Coagulation or filtration: In this method Al2(SO4)3 used to reacts with mercury to form solid which can precipitate out of the water by simple filtration.
 
2) Granular activated carbon: Granular activated carbon uses porous media, when water containing mercury is passed through this media it absorbed the dissolved contaminants and held on the solid surface.
 
3) Lime softening: In this method, Ca(OH)2 is added to the mixture, to raise the pH level and the heavy metals like mercury are precipitate out as Hg(OH)2. This method is cheaper than other method and reliable.
 
4) Reverse osmosis: In this method water is pushed through a semi-permeable membrane of a polyamide film, and all impurities are separated out. this method is fairly expensive.
 

Answered by Ramandeep | 02 Jul, 2018, 10:01: AM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 9 - Chemistry
Explain crystallization process with example  _please explain  how burning of candle is both a physical and chemical change
Asked by saradamahapatra9999 | 15 Jul, 2020, 08:48: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Which method we can apply to seperate water and mercury  and why
Asked by Nimmi | 01 Jul, 2018, 10:19: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
What are the different kinds of filters used by people in everyday household works?
Asked by Topperlearning User | 08 May, 2014, 09:11: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
How is centrifugation done? Describe the process of separation by centrifugation.
Asked by Topperlearning User | 08 May, 2014, 09:16: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Name the gas which is added during purification of water. Why is it called a disinfectant?
Asked by Topperlearning User | 08 May, 2014, 09:17: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Explain sedimentation and decantation method.
Asked by Topperlearning User | 08 May, 2014, 09:18: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Explain the process by which we can separate cream from milk?
Asked by Topperlearning User | 08 May, 2014, 09:19: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Which method will you use to separate the following mixtures? (i) Sand and water (ii) Clay and water (iii) Cream and milk (iv) Used tea leaves and prepared tea
Asked by Topperlearning User | 27 May, 2016, 03:40: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Describe the filtration tank used in the process of water purification in water works.
Asked by Topperlearning User | 27 May, 2016, 03:40: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
What is the role of alum (Phitkari) in the process of water purification?
Asked by Topperlearning User | 08 May, 2014, 09:20: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×