Q
The purpose of adding Na2CO3 to water of low alkalinity is to__________________?
-
A
A. Permit the use of alum as a coagulant
-
B
B. Increase the softening capacity of zeolite
-
C
C. Facilitate easy regeneration of zeolite
-
D
D. All a , b. and c.
Correct Answer:
A. A. Permit the use of alum as a coagulant