Lab 2 – Water Quality and Contamination Experiment 1: Effects of Groundwater Contamination |Table 1: Water Observations (Smell, Color, Etc.) | |Beaker |Observations | |1 |Slightly cloudy, unknown chemical smell | |2 |Oil and water do not mix | |3 |No detectable difference other than vinegar smell. | |4 |Soap settles to the bottom of the beaker until stirred. Heavy soap | | |scent. | |5 |Slight cloudiness and dirt particles, no odor | |6 |Water is darker with more sediment.
Place 10 seeds in each petri dish. 3. Spray a different concentration of salt water in each petri dish. Be sure to use at least enough water to saturate the filter paper, however do not use too much water. These are the different concentrations: 0% (distilled water), 0.01%, 0.1%, 0.5%, 1%, 2%, 3%, 4%.
Lab 2 – Water Quality and Contamination Experiment 1: Effects of Groundwater Contamination |Table 1: Water Observations (Smell, Color, Etc.) | |Beaker |Observations | |1 | | |2 | | |3 | | |4 | | |5 | | |6 | | |7 | | |8 | | POST LAB QUESTIONS 1. Develop hypotheses on the ability of oil, vinegar, and laundry detergent to contaminate groundwater. If vegetable oil is placed in water, will I be able to remove it? Will it be safe to consume?
Gatorade showed negative results across the chart. As you will see we didn’t include sugar in this chart, which Gatorade tested extremely high in, as well as our other macromolecules. Unknown A, B, C, D are milk, tomato juice, ensure, and Gatorade respectively. As you can see from this chart, we tested sugars. Milk showed a moderate to high result in sugars, as for tomato juice showed a relatively low result for sugars.
MATERIALS AND METHODS In order to determine if seeds subjected with more then .5ml of the environmental contaminate ammonium hydroxide will not show growth of the plant T.aestivum, some items are needed. Some of the material are as follows; potting soil, ten soil pots of the same size and material, one hundred T. aestivum seeds, 500ml of water (50ml on each pot), a dropper, 10 ml of the household cleaner ammonium hydroxide, 10 labels, a 50ml beaker, marker and a green house. First we got ten soil pots and placed them in two rows of five pots (trial 1 and trail 2). Then we place a label on each of the potting soils. We used a marker and label the labels on the first row Plant A Tr1, Plant B Tr1, Plant C Tr1, Plant D Tr 1, and Control 1.
The lemon battery using two lemons can generate 1.5 volts, but the current is very low, about a milliamp of current. To heat the hot plate, twelve lemons are needed (six pairs of lemons multiplied by 1.5 equals nine, the equivalent to the amount of volts needed to generate the hot plate). The two circuits that could be used in connecting all the lemons together are series and parallel. A series circuit involves two resistors which are next to each other vertically (see diagram 2). In this circuit, the current stays the same, but the voltage divides when it
Drop a very small amount of iodine on a piece of paper and observe what happens to the paper. (Paper has lots of starch in it) The Iodine turned black on the paper. Supplies Needed: -plastic baggie/cheap works well -water (tap is fine—or bottled) -iodine (use caution if you are allergic to iodine/betadine) -cornstarch -measuring cup -about a 2 cup size cup/beaker/bowl—clear would be great Procedure: Fill a plastic baggie with a teaspoon of corn starch and a half a cup of water tie bag. Fill a cup (about a two-cup size)halfway with water and add ten drops of iodine. Place the baggie in the cup so that the cornstarch mixture is submerged in the iodine water mixture.
Materials/Equipment: The materials in this experiment include: Two 2 liter bottles. (Clear is preferred). 2 shredded pieces of paper towel. (About 1 per bottle). 12 Mung Beans (6 per bottle) 10 Ml of water per bottle per day.
A hypotonic solution is when the substance has lower solutes than its surroundings. During this lab, potato slices are put in 10 cups, 5 of which contain room temperature water, and the other 5 contain a solution of 20% sucrose. The goal is to measure the change in mass of the potato depending on its surroundings. c) Osmosis means that water molecules travel from low solute concentrations to high solute concentrations. This means that the potato that is dropped in water will have an increase in mass.
INTRODUCTION: Acids Acids are any chemical compound that, when dissolved in h2o (water) gives a solution with the pH below 7.0. Acids are sour, they also destroy chemical properties of bases. Acids conduct an electrical current through them. Common Acids Acetic acid is found in vinegar. Vinegar is used for cooking things, treating jellyfish stings and pickling.