The greater the number of drops needed to make a stable lather, the harder the water. To separate temporary and permanent hard water samples, boil the water. Repeat steps two and three with the ...

Hard water is the type of water that has high mineral content (in contrast with soft water). Hard water minerals primarily consist of calcium (Ca2+), and ...

It can soften water that has temporary hardness and it can soften water that has permanent hardness. It is an inexpensive method of removing hardness but leads to the formation of limescale ...