Sodium aluminates is a better coagulates then alum, Chemistry

Q. why is sodium aluminates is a better coagulates then ferrous sulphates or alum?

Ans. Sodium aluminates (NaAlO2): It is better coagulant than FeSO4 and alum because it easily hydrolyzes.

                     2NaAlO2 + 2H2O =2NaOH + Al (OH2)3

Sodium hydroxide formed as per the above reaction precipitates Mg+2 salts.

MgCl2 + 2NaOH = Mg (OH) 2 + 2NaCl

Both Al (OH) 3 and Mg (OH)3 are flocculent precipitates and they easily trap any finely suspended and colloidal impurities such as silica and oil.

 

 

Posted Date: 7/21/2012 7:16:23 AM | Location : United States







Related Discussions:- Sodium aluminates is a better coagulates then alum, Assignment Help, Ask Question on Sodium aluminates is a better coagulates then alum, Get Answer, Expert's Help, Sodium aluminates is a better coagulates then alum Discussions

Write discussion on Sodium aluminates is a better coagulates then alum
Your posts are moderated
Related Questions
what is resonance effect? describe its application and its types?



The energy of second Bohr orbit of the hydrogen atom is -328 kJ mol-1, hence the energy of fourth Bohr orbit would be: (1) - 41 kJ mol -1 (2) -1312 kJ mol -1   (3) -164

Chain growth or addition polymerisation It includes a series of reaction each of which consumes a reactive particle and generates another similar one.  The reactive molecule m

When is fresh produce to harvest? Optimum quality of fruits and vegetables is obtained only when they are harvested at the optimal stage of maturity. A critical time for

Show by means of equations and reagents, how the following conversion would be achieved? Propyne to butanoic acid

Name the Which is a covalently bonded crystal? germanium

styx code of B4H10

240 g of water at 20 degree C are mixed with a sample of iron at 500 degree C. The final temperature of the system is 42 degree C. Find the mass of the iron sample