Analysis of Municiple Water

In: Science

Submitted By Lmarie5
Words 1402
Pages 6
Analysis of Municipal Water Lab Report

Introduction:

The recent problem that the townspeople have brought to my attention is the declining quality of the tap water. Many were unpleased with their water, so I decided to conduct my own test instead of using an outside company. Based on the complaints that the residents brought to recent town meetings, I discovered what ions could be causing the problem and began to test them. I used a Hach spectrophotometer and its instructional manual to determine the ions concentrations in the town’s water supply. The ions tested for were total chlorine, copper, fluoride, total iron, manganese, nitrogen (nitrate), phosphate, sulfate, sulfide, and zinc. Following the manual each ion’s concentration was tested for, each ion required a different powder pillow to be mixed with the water sample. Every ion that was tested also needs a blank, a separate test tube that’s concentration would be considered 0.00 mg/L. If the meter went off scale or read over range during any of the test then it would be diluted down and retested until it was in range. Next we tested the pH of the water sample by using pH paper. The pH record value of the water sample was 5. Then we tested the hardness of the water sample. I accurately measured 50-mL of the water sample with a graduated cylinder and poured it into a 125-mL flask. I then added 1-mL of pH 10 buffer and a few drops of the Eriochrome Black T indication solution. At this point the solution was a medium purple color. Then I cleaned a buret and rinsed the inside with a small quantity of 0.010 M EDTA solution. Next, I filled the buret with EDTA solution up to the 0.00 mL mark. Immediately after I warmed a flask to 60°C and then titrated the solution with the EDTA until a permanent blue color was seen. The final buret reading of the EDTA was 42.02 ml. The hardness of the water sample came out…...

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