Question

The formula of exhausted permutait is:

• A. $ CaAlS{{i}_{2}}{{O}_{8}}.x{{H}_{2}}O $
• B. $ N{{a}_{2}}A{{l}_{2}}S{{i}_{2}}{{O}_{8}}.x{{H}_{2}}O $
• C. $ CaB{{}_{2}}S{{i}_{2}}{{O}_{8}}.x{{H}_{2}}O $
• D. $ {{K}_{2}}A{{l}_{2}}S{{i}_{2}}{{O}_{8}}.x{{H}_{2}}O $

Answer 1

Answer: (B)

Zeolites are also known as permutits and in greek it means boiling stone. Zeolites are naturally occurring hydrated sodium alumino silicate minerals (like $ N{{a}_{2}}O.A{{l}_{2}}{{O}_{3}}.xSi{{O}_{2}}.y{{H}_{2}}O, $ where $ x=2 $ to 10 and y = 2 to 6) capable of exchanging reversibly its sodium ions for hardness producing ions in water. So, the formula for exhausted permutit is hydrated sodium alumino silicate. $ (N{{a}_{2}}A{{l}_{2}}S{{i}_{2}}{{O}_{8}},x{{H}_{2}}O) $