In the course of purifying water for town supply the water is passed through large settlings tanks, containing sodium aluminate (III) to remove?
A
large particles
B
germs
C
fine particles
D
odour
Verified Correct Answer: C.
Chemical Principles & Mechanism
Potash alum [kAl(S\({O}_4\))\(_2\)] n sodium aluminate (ii) (NaHCO\(_2\)) are added to cause coagulation.
As fine particles to clump together, forming large particles heavy enough to settle at the bottom of the tanks as impurities.
Source: WAEC / JAMB / NECO Classroom Archive (Record #4031)