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

Exceptional redox reaction, redox reaction of ethanal,caustic soda&copper h...

redox reaction of ethanal,caustic soda&copper hydroxide

Sodium, what can be formed by sodium reacting with epsum salt

what can be formed by sodium reacting with epsum salt

Covalent radius, Covalent/ionic/atomic radius of hex-1-ene

Covalent/ionic/atomic radius of hex-1-ene

Explain the heating curve for water, Q. Explain the Heating curve for water...

Q. Explain the Heating curve for water? Ans. When a substance is heated, it undergoes several phase changes. A heating curve is a diagram which illustrates the phase chan

Measure the average molecular weight, Suppose you are required to make an a...

Suppose you are required to make an analysis of 317 lb of combustion gas and find it has the following composition: CO 2  60% CO    10% N 2      30% a)  What it the av

Nitro compound ., what the uses of nitro compound in pharmacy

what the uses of nitro compound in pharmacy

Saturated and unsaturated hydrocarbons, Saturated and unsaturated hydrocarb...

Saturated and unsaturated hydrocarbons The compounds of carbon and hydrogen in which carbon atoms are linked to each other by single covalent bonds(C-C) are known as alkanes. T

Antiknock compounds - characteristics of hydrocarbons, Antiknock Compounds ...

Antiknock Compounds - Characteristics of Hydrocarbons To decrease the knocking property or to enhance the octane number of a fuel certain chemicals are included in it. These ar

Determing an electrovalent linkage, This of the following is an electroval...

This of the following is an electrovalent linkage: (1) CH 4                 (2) MgCl 2              (3)  SiCl 4                               (4) BF 3 Ans: MgCl

Preparation of iodoform, how will you test for the presence of the halogen ...

how will you test for the presence of the halogen in iodoform?

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