Hi guys, my chemistry is not so hot but, even so, I've tried to
understand the chemistry of hard water and soft water in my own bath
tub. The info I've read talks about carbonates and sulphates of
calcium and magnesium. And it also mentions that soap scum is
calcium or magnesium stearate. But I am getting a bit lost.
I would like some advice on how to relate my own experience to the
chemistry of what is happening.
I live in ahrd water area and if I use some scented "Creme Bath"
from the supermarket then the amount of scum I get after bathing is
reduced. (Q.1) What is it in this Creme Bath which is doing this?
(Q.2) Is sodium lauryl sulfate a water softener or is someother
ingredient the water softener? The ingredients of the Creme Bath are
"Creme Bath" ingredients:
sodium laureth sulfate
sodium lauryl sulfate
Alternatively I sometimes use powdered Bath Salts. I get the
impression that my Bath Salts actually *harden* the water with the
result that I get more scum than if I wasn't using theme. (Q.3) Is
this observation true based on the chemicals my Bath Salts contain?
The ingredients of my Bath Salts are as follows:
sodium lauryl slulfate
PEG-40 hydrogenated castor oil
The strange thing is that I have the *impression* that if I use half
the normal dose of the Creme Bath and half the normal dose of the
Bath Salts then I get less scum forming after the bath than if I used
either one at full dose.
Also this scum seems easier to remove. (Q.4) Am I imagining this
or is there any chemistry-based explanation to support what I think I