pH: Definition and measurement units. pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water. Water that has more free hydrogen ions is acidic, whereas water that has more free hydroxyl ions is basic. Since pH can be affected by chemicals in the water, pH is an important indicator of water that is changing chemically.
sealing a cinder block wall. I just finished sealing the cinder block wall in our basement with Baer waterproofing paint. After the first coat I noticed little orange rust colored spots in one corner of the room. Nice fresh white coat of paint, little spots the size of peas on one wall.
To remove ink from painted walls, there are a few methods you can try: 1  Spray some hairspray onto a Cloth until itâs fairly soaked and rub it gently over the ink mark. 2  Try some rubbing alcohol/metho on a cotton ball and dab it on the ink stain until the stain is gone. Apply some toothpaste to it, leave it for 10 minutes, then wash off with water (this method is also great for wallpapered walls). Apply some eucalyptus oil to a Chux and rub directly on the mark.