Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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.
Calculate velocity of electron in bohr first orbit of hydrogen atom
Q. What is Standard Enthalpy of Formation? Ans. It is really difficult to measure the total energy content or absolute entropy of a substance. In order to quantify entropy
what are the electron deficient molecule explain with examples
How much air (volume composition: 21% of oxygen and 79% of nitrogen) is used up in this process? Assume that oxygen and nitrogen behave like ideal gases. The products a
how can be synthesise active methylene group contining compound
Q. Illustrate phase diagram? Ans. There are two things which influence phase change: 1. The pressure exerted on the surface of a substance. 2. The addition or rele
What is the diagonal relationship between Beryllium and Aluminium
GEOCHEMISTRY The chemical processes taking place in the crust are especially important as they have build ores, concentrated mineral deposits that are exploited industrially
what is the relevance of half filled and completely filled orbitals in ionisation enthalphy ditermination
Antioxidants: Antioxidants are the significant and essential food additives. These substances hold back the action of oxygen on the food and hence help in its preservation. Th
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd