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Group 4 Project: Water Quality!



 ** Research Question: ** How does water quality differ across different sites/sources? Downtown & Xinyi Water - XinDian River, Changxin water purification site Tianmu Water - NeiShuang River, Shuangxi water purification site //Water samples//: Tian mu school: chang shan n. rd #800 Tian mu house: tian mu east rd. lane 61 number 1 6F Xinyi: 202 Song de Lu Xin yi district D   ﻿ ﻿ ﻿ owntown: Xin Yi Rd. sec.4

 ** What was tested (Why & How): ** __pH levels__ Why: pH levels are important to aquatic life, if the values of pH fall below 4 or above 9 there will be no life in the water source. How: Using a Vernier pH probe

__Water Hardness__ Why: Water described as "hard" is high in dissolved minerals, specifically calcium and magnesium. Hard water is not a health risk, but a nuisance because of mineral buildup on fixtures and poor soap and/or detergent performance. kidney problems How: 50 mL of water was mixed with a 5 drops of diluted soap in a 125 mL volumetric flask. The four flasks of different water sources were shaken for the same amount of time and we observed the foaminess of each.

__Dissolved Oxygen__ <span style="display: block; font-family: Georgia,serif;">Why: Understanding the amount of dissolved oxygen is important in determining the water's ability to support plants and animals. One major factor that effects dissolved oxygen is temperature. <span style="display: block; font-family: Georgia,serif;">How: Using a Vernier probe for dissolved oxygen <span style="display: block; font-family: Georgia,serif;">__Salinity__ <span style="display: block; font-family: Georgia,serif;">Why: Drinking in water that is too salty will result in dehydration. <span style="display: block; font-family: Georgia,serif;">How: Using a Vernier probe for salinity <span style="display: block; font-family: Georgia,serif;">In general: Water is essential to human life, therefore, if it can be proven that water in a certain region from a certain source is 'better', there will be great implications on real estate. ** Results **

__<span style="font-family: Georgia,serif;">pH __ <span style="font-family: Georgia,serif;">- Tian mu school: 6.48 - Tian mu home: 6.36 - Downtown:7.23 - Xinyi: 7.46 __<span style="font-family: Georgia,serif;">Water hardness __ <span style="font-family: Georgia,serif;">- most foamy 1- 4 least foamy - Tian mu school: 2 - Tian mu home: 1 most foamy - Downtown: 3 - ﻿Xinyi :4

__Dissolved oxygen__ - Tian mu school: 0.7 mg/L - Tian mu home: 0.5 mg/L - Downtown : 0.6 mg/L - Xinyi : 0.6 mg/L

<span style="display: block; font-family: Georgia,serif; font-size: 130%;">__Salinity__ - Tian mu school: 0.1 ppt - Tian mu home: 0.1ppt - Downtown: 0.1 ppt - Xinyi :0.1ppt

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