1. Look up the term ‘serial dilutions’ in a textbook or web source and explain i
ID: 954555 • Letter: 1
Question
1. Look up the term ‘serial dilutions’ in a textbook or web source and explain it in your own words.
(1 points)
Serial Dilution is a dilution process where you have a stock concentration and you will be diluting it with something else. You will continue diluting it until you get the wanted concentration.
2. Regarding the visible spectrum, what is the relationship between color and wavelength?
(1 points)
3. What volume of a 1.00 x 10-3 M phosphate stock solution is required to make 100.0ml of a 4.00 x 10-6M solution? (If you’re rusty on your gen chem, look up ‘dilution’ in your textbook index.) (2 points)
4. Textbooks often contain diagrams/illustrations to relay scientific information. Read the following passage and draw a diagram/illustration that represents eutrophication. (1 points)
“The problem of eutrophication is affecting the water supply of towns across the nation making the water unsafe for consumption and hazardous to wildlife. The source of the eutrophication is an excessive input of nutrients into the rivers lakes and seas because of extensive use of fertilizers, the combustion or fossil fuels, and waste from animal feedlots. This excessive nutrient input stimulates the growth of algae and bacteria, robbing the water of precious oxygen. The resulting algal blooms, red tides, and deterioration of sea grass make the waters uninhabitable for most fish and coastal wildlife”
Explanation / Answer
(3) Knowing the dilution formula,
M1V1 = M2V2
1.00 x 10-3 x V1 = 4.00 x 10-6 x 100.0
V1 = 0.4 mL
Hence take 0.4 mL of stock solution and make it dilute to 100 mL of the solution to get 4.00 X 10-6 M solution
(2) The wave length is increased from Violet colot to red color
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