It turns out that a hot solution of alum (ammonium aluminum sulfate), which is available in the spice rack of your local supermarket, will dissolve the steel drill bit without reacting with the brass.

Red alum, an age-old remedy with multiple uses, has been a trusted ingredient in skincare for generations. Known for its ...

If it was a little tricky to tell the difference between salt and alum in the dissolving test, give the construction paper test a try. Place a cotton swab in each solution. On the construction paper ...

When someone flushes a toilet in New York City, that wastewater enters a vast 7,400-mile network of pipes, passing though 96 wastewater pump stations and ultimately ending up at one of 14 wastewater ...