zeolite

Question 1

What are zeolites ?

Answer 1

Zeolite is a naturally occurring mineral and the formula is Na2O.Al2O3.xSiO2.yH2O
( Hydrated Sodium Aluminosilicate )
x = 2-10 ; y = 2-6.
They have an exchanging capacity (zeolite undergoes an exchange reaction)

Question 2

What are the two types of zeolites ?

Answer 2

1) Natural zeolite
2) Synthetic zeolite

Question 3

What do you mean by Natural zeolite ? Also give an example.

Answer 3

These are non-porous , amorphous and durable.
Example : Netrolite Na2O.Al2O34SiO2.2H2O

Question 4

What do you mean by Natural zeolite ? Also give an example.

Answer 4

These are non-porous , amorphous and durable.
Example : Netrolite Na2O.Al2O34SiO2.4H2O

Question 5

What do you mean by Synthetic zeolite ?

Answer 5

• They are porous in having a gel-like structure.
• They can be prepared by heating Sodium Carbonate Silica and Alumina.
• They have high exchange capacity as compared to natural zeolite.

Question 6

Draw the diagram for Synthetic zeolite.

Answer 6

Go and check out the notes.

Question 7

What are the advantages of the zeolite process ?

Answer 7

1) Water obtained after this process has residual hardness of 10 ppm.
2) There is no sludge formation.
3) The equipment is compact and requires less space.
4) It requires less time for softening.

Question 8

What are the disadvantages of the Zeolite process?

Answer 8

1) Water should not be turbid otherwise it will block the pores of zeolite.
2) Water should not be hot otherwise it will dissolve zeolite.
3) Only cations are replaced by this process not the anions.

Question 9

Formula for zeolite numericals

Answer 9

Mind map

Question 10

Reaction and regeneration reaction.

Answer 10

Mind map