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
This cycloaddition reaction involves sixteen electrons; hence, it must be suprafacial on one component and antarafacial on the other.  Thus, it must be a [14s + 2a] or a [14a + 2s]

1. Alcohols and amines are both nucleophilic. Explain why this reaction occurs to form Benadryl (diphenhydramine) 2. Outline a reasonable synthesis of the following:

I WANT TO DISCUSS ABOUT IRON CHEMICAL ANALYSIS.POSSIBLE THAT?.

what are postulates of rate theory?

Elements of Group 13 are namely, boron, aluminium, gallium, indium and, thallium. While studying the alkali and alkaline earth metals, you have seen that all the elements of these

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

Hexagonal Close Packed (HCP) Structure:-  The cell of HCP system has 12 corner atoms, one at each corner of the hexagon with two base centered atoms, one at the top face of the

CRYSTAL FIELD THEORY


Q. Effect of addition of ingredients on egg foam stability? The addition of other ingredients also influences stability. Sometimes salt is added to an egg white foam for flavou