Vinegar, which contains acetic acid, can lower the pH levels of water ... pH deviates too far from the required safe zone on the scale. Chlorine works best at 7.4, so if it drops too low, it ...

Vinegar is a substance that almost everyone ... describes as an acid that falls somewhere between a 2 and a 3 on the pH scale, can be used to help target specific problems in the wash.

The pH scale measures how strongly acidic or alkaline ... Red cabbage A kettle and water Household substances to test, such as lemonade, vinegar, baking powder or toothpaste.