The definition of
PH : PH is a numeric scale which measur
the activity of hydrogen ion. The PH scale range is from 0 to 14, used to specify the Acidity or Basicity of an
ph=7 represents a neutral solution, lower numbres indicate
increasing Acidity and higher numbers indicate increasing Basicity.
EPA (Environmental Protection Agency) maintains strict standards to appropriate
PH levels in drinking water: the PH levels must be within the range of 6.5 to 8.5 to fall within EPA standards,
assuming acidic or basic water is harmful.
The following video will show you the PH level of tap-water, taken by Moran Pearlstein at kibbutz Snir, Israel.
OUR question is : What is the PH level at your
home tap water ?
Add a point on the map which shows your home geographic location and write the PH value you measured at your home.
To answer this question you may
need a PH indicator, which you can purchase at any pet store that have products for aquariums.
For this course - Maya Usher has our kit and you can pick it up from her office at the Technion.
Provide an answer by clicking on "Map" and then on "Add an Answer".
Results, Analysis and Discussion Results: The results are almost all identical- 7.4, only one is significantly different-7.0.
Analysis and Discussion: Since the majority of results are the same , we can say we have a clear answer to our research - that the PH at Household tap water is 7.4, and that result of 7.0 is an exception. On the other hand, there are many more parameters to check correlation between ,before setting to conclusions, such as:
It might indicate differences between areas, since all the results of 7.4 are from the north region of Israel, and the result of 7.0 is from the center region.
It might indicate that the process of water treatment that potable water are treated with may set them to the values of 7-7.4.
The measurement tools where different at every location, and also most of them were not very accurate (scale of 0.2).
There are very few results.
The results are mostly from the north region - not enough geographical difference.
The results does not take considerations the piping materials and there affect on the water PH.