Phosphate conditioning, Chemistry

Assignment Help:

Q. Write phosphate conditioning method for water softening with suitable chemical reactions. How it is different from soda lime method.

Ans. 

Phosphate conditioning: In high pressure boilers, scale formation can be avoided by adding sodium phosphate, which reacts with hardness causing substance of water, forming non adherent and easily removable soft sludge of calcium and magnesium phosphates, which can be removed by blow down operation.

 

3MCl2 + 2Na3PO4 = M3 (PO4)2 + 6NaCl

 

Where   M = Ca+2 or Mg+2

Mainly employed phosphates are:

1.      Sodium dehydrogenate phosphate (acidic) Na2HPO4

2.      Disodium hydrogen phosphate (weakly acidic)  Na2HPO4

3.      Trisodium hydrogen phosphate (alkaline) Na3PO4.

Difference between phosphate conditioning and Lime-Soda method

 

Phosphate conditioning

Lime-soda process

1

This is internal treatment method.

This is external treatment method.

2

It just supplements the L-S process and is not meant to replace L-S.

It has its own importance and is meant that it is necessary.

3

In this appropriate sodium phosphates are added.

Calculated amount of L and S is added.


Related Discussions:- Phosphate conditioning

Normality, I don''t understand the concept of normality and gram equivalent...

I don''t understand the concept of normality and gram equivalent

Full Balanced Equations, #question.What is the balanced equation for the re...

#question.What is the balanced equation for the reaction of aluminium nitrate solution and sodium carbonate solution; where aluminium hydroxide is formed.

Periodic table, How do we extract group one alkali metals?

How do we extract group one alkali metals?

Illustrate relative amount of two co-existing phases, Illustrate and demons...

Illustrate and demonstrate that, for correct mass balance, relative amount of two co-existing phases or micro constituents should be as given by lever rule. The lever rule giv

Uses of acid amides, Uses of Acid Amides (a) Acid Amides used in organi...

Uses of Acid Amides (a) Acid Amides used in organic synthesis. The compounds like methyl cyanide, Methylamine and ethylamine can be prepared. (b)  Acid Amides used in leathe

Explain the term acceptance tests, Acceptance tests What are Acceptanc...

Acceptance tests What are Acceptance Tests? Acceptance tests are used to evaluate product acceptability or liking or to determine which of a series of products is the most acc

Show the process of ion exchange chromatography, Q. Show the Process of ion...

Q. Show the Process of ion exchange chromatography? The process of ion exchange chromatography is the most important, effective and rapid method for the separation and purifica

Importance of vulcanization of rubber, Q. Explain: Vulcanization of rubber ...

Q. Explain: Vulcanization of rubber is necessary. Ans. Importance of vulcanization of rubber: 1.                 Vulcanization makes cross-links between the long unsaturat

Ninhydrin test- test of proteins, Ninhydrin test- test of proteins Ninh...

Ninhydrin test- test of proteins Ninhydrin test : This test is specified by all proteins. While a protein is boiled along with a dilute solution of ninhydrin, a violet colour i

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd