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The Effect of Water Salinity Levels on Water Acidity (pH) and Water Conductivity in Jeddah

Student(s):Lamar Yahya Ali Tomaihi
Grade Level:Secondary School (grades 9-12, ages 14-18)
GLOBE Teacher:Manal Alnami
Contributors:T.Hind Al-jehani
Report Type(s):International Virtual Science Symposium Report, Standard Research Report
Protocols:Conductivity, Salinity (including Titration), Water Temperature, Water Transparency, pH
Presentation Poster: View Document
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Date Submitted:03/13/2020
Water Secrets
Water is an important element of our life. It is composed of oxygen and hydrogen. Saltwater characteristics differ from fresh water. Seawater average salinity equal to 3.5%. The average of sea water density at the ocean surface is 1.025, which is higher than the fresh and pure water density because dissolved salts increase the mass of water. Some ions have a great precipitation velocity. The percentage of dissolved solids in seawater is much higher than that of freshwater solvents. Conductivity is a measure of the water's ability to pass an electric flow. It decreases with increasing of salinity and increases with the increases of temperature. The pH is abbreviation of " power of hydrogen " and it measures the molten concentration of the hydrogen ions in the water. The study indicates the effect of water salinity on the value of the conductivity and acidity (pH) and the relationship between them. In the study of this relationship, GLOBE devices were used: hydrometer (specific gravity), the alcohol thermometer (temperature), the conductivity meter, the pH meter as well as the salinity table. In the research experiment, the following were used: fresh, salt, pure water. This study showed several conclusions .