water quality lab procedure Question 1 is located below: Questions 2-7 of the pr
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water quality lab procedure Question 1 is located below: Questions 2-7 of the pre-laboratory assignment can be found at www.chem21Labs.com. You MUST COMPLETE the ONLINE pre-lab assignment by the deadline for YOUR REGULARLY SCHEDULED LAB SECTION in order to get into lab. Check your experiment schedule to see when this portion of the pre-lab is due. Meet with the members of your team and write a procedure to collect and analyze four drinking water samples. Your procedure must include glassware, equipment, chemicals, chemical names, and concentrations that will be used in lab to analyze the water samples. It may be in the form of a flowchart. Do a good job drafting it-you will use your own procedure in lab and it will be the beginning of your formal lab report. Prepare a data table to record the data of the sample collection. Prepare a data table to record all of the data during lab. If you have written the procedure well, it and the data you obtain in lab while testing the sample will provide the answers to all of the following questions by the end of the testing of the samples. Your plan and data tables should address all of the following questions: How much sample is needed in order to perform all the tests? What is the source of the sample? When was the sample collected? How much sample was collected? What type of container was used to collect the sample? What was the approximate temperature of the sample when it was collected? How was the sample stored after collection? How cloudy is your sample? What pretreatment of the sample is necessary? Does your sample smell? How acidic is the sample? What is the hardness of the water? How many dissolved solids are in the sample How alkaline is your sample? What is the nitrate level in your sample? How much chloride is in your sample?***Explanation / Answer
Solution.
a) To find how much sample is needed you should add all the volumes of water required from all the tests in your lab.
b) The source may be river, stream, lake, wetland or tap water.
c) The time and date of sample collection.
d) The volume of a sample.
e) Plastic or glass bottles.
f) The temperature measured by a thermometer.
g) Name the preservative mentioned in lab; the temperature should be less than 39F.
k) The acidity can be measured by a pH-meter. The classification is: basic, neutral, acidic.
l) The hardness is the sum of calcium and magnesium concentrations in water.
All other questions are about the chemical composition which can be determined using the methods mentioned in the lab.
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