write a lab report about testing water (no more than 5 pages)

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this is an experiment about testing water, and we chose the "DC" water sample.

for more information please check the introduction document.

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Assignment – Lab Report Previous Next Water Quality Lab Report Each of the bold parts below are used as section headings in your lab report. Your report should be in a 12-point font, double-spaced and no longer than five pages (including the tables). Consult the lab report rubric in addition to the details below. Title (make it specific to the topic and your water sample) Introduction: In one paragraph include the following: • Provide at least three pieces of background information on the importance of clean water and how the quality of water is tested. Cite your sources! • State the hypothesis and prediction about your particular water sample. Make sure your hypothesis has an explicit justification and is not just a guess or your opinion. Use sources to convince your reader! One or two sentences to connect your background information with the importance of your hypothesis and your prediction for the experiment. Materials and Methods State which assays you performed and the positive and negative controls for each. Summarize the Winkler and Coliscan Assays. Make sure you use past tense and do not include a materials list or any reference to containers! Results Include a description of the water sample and the source of the water. Summarize the results of your water sample at every station, citing your data tables (1-3). This should be written in paragraph form. Include the following data tables in your results section. • Table 1: Water Sample Results Chemic al Testing Form Positi ve Contr ol Negat ive Contr ol Sampl e 1 ____ _ Sampl e2 ____ _ Sampl e3 ____ _ Sampl e4 ____ _ Sampl e5 ____ _ Sampl e6 ____ _ Iron Chlorin e Ammon ia Calciu m Magnes ium pH Nitrates (ppm) Dissolv ed oxygen (ppm) Table 2: Presence of Bacteria Sample: _______ # colonies/ plate # E. coli (dark blue/ purple colonies) # Other colifoms (pink/ red colonies) # of other bacteria (green colonies) Table 3: Dissolved Oxygen Calculations Sample: _______ Number of 1mL Thiosulfate aliquots # aliquots (total volume) Number of 100 uL Thiosulfate aliquots Total volume (in mL) Thiosulfate added Calculate dissolved oxygen in sample using the following conversion rate – 1 mL Thiosulfate added = 6 mg of oxygen/Liter (ppm) Discussion • Summarize ways in which the water can be affected by the environment. How did this influence your hypothesis and prediction? • Describe how your results supported or refuted your hypothesis and your prediction. You may also need to explain why results were inconclusive. Make sure to include the outcome of positive and negative controls if results are inconclusive. • Describe any problems or issues with observing and quantifying the assays, oxygen titration, and coliform bacteria colony growth. • If water is clear and smells fresh, can you consider it safe to drink? Give two reasons why or why not. • Look up the Clean Water Act that congress established in 1972. Is it still important to current day? In a couple of sentences, write a conclusion about the importance of safe drinking water in terms of globalization and the biological significance to growing human populations. References: You should use at least 3 outside references (in addition to your lab manual). Cite these in the text as you reference them. Want to cite this manual? Go here for APA citation information. •
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Hi, Find attached the completed work.Feel Free to ask for any clarification and editing if need be.Looking forward to working with you in future.Thank you

Running head: LAB REPORT

Lab Report
Student’s Name
Professor’s Name
Course Title



Water quality refers to the measure of water conditions including its physical, chemical,
radiological and biological characteristics relative to requirements of biotic species as well as human
purposes and needs. It is, therefore, a reference for evaluation of water standards for different uses in
relation to the safety of drinking water and human contact plus the state of the ecosystem (Edition,
2011). According to Ahuja, Kremer & Zwane (2010), clean water is essential for numerous reasons;
for food production, hydration, and sanitation among others. The safety of water is of utmost
importance because human beings need about 20-50 litres of water on a daily basis to be able to
perform their duties effectively. Unsafe water has the capacity to cause health problems such as
diarrhoea, intestinal and gastrointestinal problems, and dehydration and in extreme cases, death
(Horwood & Greenhill, 2012). As such, it is important to perform an evaluation and analysis of how
the quality of water is tested. In performing a full test of water quality, a number of variables are
measured including the turbidity, presence of solids, pH level, amount of dissolved oxygen, nitrates
and phosphorous as well as bacteria (Kirchner, 2006). The purpose of this experiment is to conduct
an investigation into the quality of DC water based on the hypotheses that this water is of high
quality and fit for consumption and other uses as asserted by Hounslow (2018). Because of the
numerous uses of water and the dangers posed by the use of unclean water, it is essential to test for
the quality of water and perform specific procedures to make the water essential for use. In DC
specifically, water quality is expected to be high because of the treatment procedures that are taken
by the DC Water and Sewer authority (WASA).
Materials and Methods
An assay for calcium and magnesium was performed, the positive controls for both calcium
and magnesium stayed pink indicating...

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