Question

Permanent hardness of water may be removed
by the addition of
A. sodium carbonate
B. alum
C. potassium permanganate
D. lime

Answer 1

sorry idk

Answer 2

@Armistice , @itsthatguy

Answer 3

@GretaKnows

Answer 4

I think it's A

Answer 5

Yep i think so too.

Answer 6

yeah that's what i thought too

Answer 7

Yeah its sodium carbonate.

Answer 8

i think it's A to

Answer 9

any other questions you need help with?

Answer 10

Id medal all of you, if I could lol