Remove brown toilet stains/deposits

[Anonymous]

We cleaned a stained toilet bowl with a pumice stick

now only need regular liquid cleaner and a brush occasionally.

[micky]

Regardless of your sarcasm and smiley, he's right. You yourself just said it applied to sulfuric acid, the acid in a car battery.

If he pours the acid straight in the toilet, he does it right, but as we discussed in the 3-step chain of negligence**, he might mix water into the acid in a separate container, who knows why, and plan to pour that in the toilet.

**Shooting and killing a photographer while making a movie; drinking bleach found in a milk carton.

[Ralph Mowery]

The acid in the car battery is deluted enough it does not matter.

[gfretwell]

Yup, the right answer. That is pretty much true of any acid the homeowner will ever see. It does make sense in a lab where you are using reagent grade acid and test tubes. (Volcano, right in your face)

[invalid unparseable]

Google says battery acid is 15 to 35 percent sulfuric acid. It is that initial heat of hydration of concentrated acid that makes it hazardous. Even concentrated sulfuric contains almost 2 percent water. We had to work with 100% which is made by adding oleum to concentrated acid to get rid of excess water.