Water Hypothesis Lab Report

The difference was in how long it took for the bubbles to come to the surface and the solution to become clear. Also, when doing the lab, once the correct temperature for the water was reached, the experimenter pulled the beakers out one by one completing all 5 trials. This may have caused slight fluctuations in data because by the time the 4 trials were finished, the temperature of the beaker may have increased by a few degrees. As for the act of measuring, there was a slight error because the experimenters did not take the beakers off the hot plate at exactly 30.00 degrees, or whatever the temperature may be. In order to provide more accurate results, the experimenter could do all

The purpose of the experiment was to test the levels of water contamination in each beaker to see how high each vial would contaminate the water based on the color the water became once each vial was poured into the given beakers. In Experiment 2: Water Treatment, I used potting soil, sand, activated charcoal, gravel, alum, bleach, and beakers with my own-supplied tap water. The purpose of this experiment was to see if the different particles placed in the tap water could be removed by various filtration techniques. In Experiment 3: Drinking Water Quality, I used several various test strips, each individual strip testing for ammonia, chloride, 4-in-1, phosphate, and iron, along with samples of Disanti bottled water, Fiji bottled water, and my own tap water from home. The purpose of this experiment was to determine if bottled water is any more or less filtrated than my own tap water at home.

This could have been affected by the fact that maybe not all drops in each test tube were accurate, some tubes could have gained an extra drop while another tube did not have enough. This would explain why every group didn't get the same answer, because each group put more or less drops of each solutions in each test

The next step in this lab is to rinse the Erlenmeyer flask with distilled water down the drain and then repeat the experiment, this time adding 10 ml of 0.10M KI and 10 ml of distilled water to the flask instead. The flask should again be swirling to allow the solution to succumb to the same temperature as the water bath and once it has reached the same temperature, 10 ml of 3% H2O2 must then be added and a stopper must be immediately placed on the flask and recording should then begin for experiment two. After recording the times, the Erlenmeyer flask must then be rinsed again with distilled water down the drain. After rinsing the flask, the last part of the lab can now be performed. Experiment three is performed the same way, but instead, 20 ml of 0.10 ml M KI and 5 ml of distilled water will be added and after the swirling of the flask, 5 ml of 3% H2O2 will be added. After the times have been recorded, data collection should now be complete.

14. The experiment was repeated with each water temperature until all tests had been conclusively completed.

The start of the experiment consisted of filling up four beakers with de-ionized water to 150 ml. After the beakers were filled to the appropriate amounts they were then labeled with the

In the Experiment, we tested if the dissolved oxygen levels would increase depending on the amount of fish. Our hypothesis states that, If the number of fish decrease then the dissolved oxygen levels will decrease. The data does not support the hypothesis because the SEM bars overlap but the data is leaning in the direction of negative dissolved oxygen levels. In the graph, data is inconclusive because of the SEM bar overlap, but the conclusion states that if we keep adding fish then the Dissolved oxygen levels go down. Some of the things that went well were the D.O. Levels were constantly increasing like our background information includes.

Repeat this procedure at least three times to test accuracy and precision. During the duration of this experiment, to maximize the results, keep the temperature of the water and treatments constant, because higher temperature corresponds to faster reactions while lower temperature corresponds to slower reactions rates, imposing flaws to the experiment. Also use the products from the same brand each trail, mixing brands will impose errors to the

    One possible source of error that can affect the results was that a mercury thermometer was used instead of an electronic one. The use of a mercury

First I gather all my materials needed for the experiment (see materials list). Second I peel and slice potatoes weigh each potato in grams. Get these slices to weigh the same in mass because if they vary to much in mass that could affect the results of the experiment. Third I place each potato in its own beaker. Fourth once the potatoes are placed in beakers I make sure to place enough solution to fully cover the potato. Each beaker should have a different amount of

How could I turn my somewhat “dirty” reservoir water into clearer drinkable water? In other words does hand filtering this water create a cleaner result? Hypothesis 1: If I were to collect water samples from my reservoir and place it through two different filtering techniques (boiling/using a filter sheet and one just using a filter sheet), then the water will become clearer using the boiling technique because it’s going through a filter sheet then its bacteria is being boiled away. Does placing birdhouses and bird seeds/water in my trees increase the number of birds I see around my house?

I have been hired to recommend soil salt concentration and soil pH, as well as optimize light bulbs, for a greenhouse growth of different types of potatoes. Based on the recommendations that I give to the growers, they will be able to begin their trails to further optimize potato growth. To be able to find the recommended soil salt concentration and soil pH for these potatoes I had to be able to determine the ideal soil salt concentrations by calculating percent mass change in potatoes at various salt concentrations, determine the optimal pH for maximum catalase activity, and I had to be able to use a spectrophotometer to determine the absorbance of pigment extracted from leaves. Initially,important information to know to be able to determine the ideal soil salt concentrations by calculating percent mass change in potatoes at various salt concentrations is osmosis, osmosis in animals cells vs.plant cells, enzymes, catalase enzymes, and determining the absorption spectrum extracted from leaves.

Purpose: The purpose of this lab is to familiarize you with osmosis and, specifically, what happens to cells when they are exposed to solutions of differing tonicities.

For this lab, we decided to focus on specific parameter values in order to compare the water samples from one another. We began testing out the temperature of the waters, for little lake pond (groundwater) we found that the temperature was at 20.20C, for the drinking water (groundwater) we saw a similar temperature at 20.28C, the canal water had a slight difference at 18.53C. These measurements were taken during the morning and during early Spring, these factors could be a possible indication for the low temperatures [1]. Dissolved oxygen (DO) percentages were then taken, little lake pond had a DO of 101.50%, drinking water had 93.60% and canal had 93.91%. These percentages are within the same range due to the water being sampled during the

A color code was used to tell what the pH of the water was. For example, if the pH was 6, the pH test paper would turn into the color yellow, and if the pH was 7, the pH test paper would be a light green. Identifying the pH based on color could have slight human error as the pH could actually be 6.8, but when the pH of the water was tested, it could have been seen as a light green instead of a darker yellow green, thus the pH would be identified as 7 instead of the proper 6.8. Another issue that could’ve been caused from human error was that when measuring the amount of water by using a graduated cylinder, it could’ve been measured a slight bit off. Originally, the amount of water that was used for testing was 25mL. However, when measuring the amount of water, the water could’ve been 24.9 mL instead of 25mL due to the miniscus being formed and where the meniscus was believed to be. This would cause the amount of water being tested not the same for all the types of waters. Another issue that could’ve affected the result was that the refrigerator that held the test tubes that were in the cooler environment was frequently