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

Equilibrium : N2 + 3H2 ----> 2NH3 , How does an equilibrium is disturbed by...

How does an equilibrium is disturbed by adding 1 mole of H2 in the following reaction: N 2 + 3H 2 ----> 2NH 3 Ans) The equilibrium will not be affected according to Le Chatel

Metal carbonyls, What are the structure and bonding of metal carbonyls ?

What are the structure and bonding of metal carbonyls ?

Organic chemistry , Draw the important resonance contributors for the benze...

Draw the important resonance contributors for the benzenoium intermediate in the bromination of aniline and explain why ortho, para substitution predominates ?

Electromeric effect, types of elecromeric effect and applications

types of elecromeric effect and applications

Nodes, 3p orbitals has how many nodes

3p orbitals has how many nodes

Assignment, Redox systems in bioinorganic chemistry

Redox systems in bioinorganic chemistry

Mention the stages in product life cycle, Q. Mention the stages in product ...

Q. Mention the stages in product life cycle, at which sensory evaluation is used? Initial screening, product optimization, scale up and production are the stages in product lif

Classification of polymers - linear polymers, Classification of polymers - ...

Classification of polymers - Linear polymers These are polymers where monomeric units are linked together to form linear sequential chain. These linear sequential polymers are

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