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

The energy of an electron in orbit of hydrogen atom is, The energy of an e...

The energy of an electron in   orbit of hydrogen atom is : (1) 13.6/n 4 x eV                 (2) 13.6/n 3 xeV   (3) 13.6/n 2 xeV                 (4)13.6/nx eV Ans:

Explain the consumer oriented product development, Consumer Oriented Produc...

Consumer Oriented Product Development It is important that new product development strategies are adjusted to identified needs in the market. This requires an appropriate met

Petrochemicals - characteristics of hydrocarbons, Petrochemicals - Characte...

Petrochemicals - Characteristics of Hydrocarbons All such types of chemicals that are derived from petroleum or natural gas known as petrochemicals. Some chemicals that are fou

Show the nomenclature compounds, Q. Show the Nomenclature compounds? In...

Q. Show the Nomenclature compounds? In the earlier days naming of complexes was based on the colour of the complex. For example: Compound                              Colou

Cadiot.chodkiewicz coupling, history of this reaction.is any ligand is need...

history of this reaction.is any ligand is needed for the reaction?

Independent and dependent variables, what is the difference between both in...

what is the difference between both independent and dependent variables?

Double titration , How do we solve numerical problems in double titration

How do we solve numerical problems in double titration

S-block element, phsiscal properties &chemical propertise

phsiscal properties &chemical propertise

Hybridization, hybridization in hydroxyl group

hybridization in hydroxyl group

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