You leave a cup of tea for a few minutes, come back, and see an unsightly film? This scenario doesn't happen just to you.

You’ve probably heard of the chemical calcium in milk. But calcium shows up in lots of ... Place the crushed eggshell and antacid tablet in a piece of paper. Place 1 Tablespoon of water and 1 ...

A little water helps expose the sodium so it can react with the chlorine gas ... negative ions attract each other and form the ionic compound sodium chloride. One calcium and two chlorine atoms are ...

Aluminium, magnesium and calcium react quickly with dilute ... The bottom of the ship is coated with a metal which did not react with sea water. The bottom of the Cutty Sark is coated in a mixture ...

A water softener reduces the dissolved calcium, magnesium, and to some degree manganese and ferrous iron ion concentration in ...