The most common constituents that make water hard are magnesium and calcium ions, since these form only very slightly soluble salts with anions in soap. The other alkaline earth metal cations have the same effect, but occur less commonly.
Iron is the substance most likely found in hard water. A type of salt can be used to help control the feel and taste of iron in water.
Chalk is one but there are many :D
CaCO3
the England it is likely to be found in SSouthampton, Brighton, Lincoin and Bury
ionic
is it fluoride
My penis
it is used for concrete because it dry into a hard substance and when mixed with the right substances, can dry under water
yorkshire!
the England it is likely to be found in SSouthampton, Brighton, Lincoin and Bury
mineral substance
The water was evaporated.
Ice block
salt
this is because it is a hard substance
ionic
when wate ris adde to metallic oxide it forms a hard substance
If you have trouble getting soap out of your hair after washing, the water is most likely hard water. Hard water can cause build up in the hair which can cast a dull appearance. This can be removed with a chelating shampoo.
is it fluoride
YES, it's is the calcium that makes the water "hard". That is why you use a cleaner that has a calcium remover in it to get those hard water stains off.