To detect hard water and soft water

To detect hard water and soft water


Always Mansama and see that there is water it clear that with foam soap

And there is water easily with soap foam

To see these two types of water conducting the following experiment: -


Tools required: -

Promising food - a bar of soap - distilled water - water pine -
Three glass jars lid - pen - paper - tape.


How It Works: -
1 / preach good soap human beings.



2 / Add one tablespoon of grated soap in one of the three jars.
3 / Add 6 tablespoons hot water in this jar.
4 / Mix well and thus consists soap solution.
5 / write on this jar (soap).



6 / second Fill the jar with water and pine pine type water.
7 / third Fill the jar with the same amount the previous but with distilled water and then type jar of distilled water.
8 / Add five points of soap solution by a dropper to the jar
Pine containing water and closed the jar and a good jolt.



9 / If you do not show lather, add another five points of soap
LORGUES again until lather appears.
10 / Calculate the amount of soap additives (drops) until foam appears
Soap.
11 / Repeat the same work in a jar with distilled water.
12 / Calculate the amount of soap added to distilled water until the foam appears.



13 / compare Alkmetin of soap added in the case of distilled water and water
Pine. What note?


Dimensions: -

We note that Pine is water that needs to be the amount of soap than those
That the water needs to be distilled foam. So liquid that tap water is
Hardship while distilled water is soft water


Altvsiralalma: -

The explanation is that pine water contains calcium salts
That interact with soap consisting deposit prevents foam
Tap water needs to a large quantity of soap until interact with these salts and get rid of them and then show unlike foam distilled water free of these salts.


Note: - experiment can be made for the first year secondary students studied hard water and its relationship to the salts
Calcium and magnesium