1/23/2018Materials may produce an undesirable odor, taste, or color.

1/23/2018Materials 24 bell pepper plants24 pots3 trays3 graduated cylinderSodium chlorideChromium chloride Water 3 one gallon jugsPotting soil Magnetic laboratory agitatorProceduresPot 24 bell pepper plants.Split plants into groups of 8, and place each group into a plant tray..Label each of the groups with the designated variables (NaCl, H2O, CrCl3)..Label 3 one gallon jugs with corresponding test and control group(s)..Pour water and sodium chloride in to one jug, allow it to dissolve before watering plants with it..Fill a separate jug with water.Pour water and and chromium chloride in to a magnetic laboratory agitator and allow it to dissolve Once mixture is dissolved, transfer it to a one gallon jug.Pour 50 mL of each liquid in separate graduated cylindersWater each plant in the control group with 50 mL of waterWater each plant in the chromium chloride test group with 50 mL of the chromium chloride/water solutionWater each plant in the sodium chloride test group with 50 mL of the salt water solution.Water each group with assigned solution and count the healthy leaves of each plant every 3-4 days.Collect data each time plants are watered.Document watering dates and data collection dates.Research Summary The contaminant lead enters the environment from industry, mining, plumbing, gasoline, coal, and as a water additive. The contaminant chloride, may be associated with the presence of sodium in drinking water when present in high concentrations. Often from saltwater infusion, mineral dissolution, industrial and domestic water. Lead is a contaminant that is carcinogen, this means that it causes cancer. Some substances are naturally found in rocks or soils, such as iron, manganese, chlorides, fluorides, sulfates, can become dissolved in groundwater. Some substances may pose a health threat of consumed in excessive quantities; others may produce an undesirable odor, taste, or color. Millions of tons of fertilizers and pesticides are used annually in the United States for crop production. Some pesticides remain in soil and water for many months to many years. The specific molecules that are going to be used in this experiment are lead, sodium chloride, and chromium chloride. Each have a specific element that is harmful to a plant when mixed with water. Specifically with lead, plants absorb this chemical from the soil and retain most lead in their roots, (also some evidence that states that plant foliage can also take up lead). Lead pollution coats surface of the leaf and reduces amount of light reaching it. The results are then reduced rate of photosynthesis, inhibiting, respiration, and premature aging. The chemical sodium chloride mixed with water causes wilting, drought stress, and the height of the plant decreases. A plant can grow with NaCl added into the water, however, it can take effect on the plants as listed above. With an increase of NaCl, it causes an increase of calcium and sulfur concentrate. Problem Statement Will the addition of sodium chloride and chromium chloride to water used for watering plants affect the amount of they will grow.HypothesisWhen sodium chloride and chromium chloride are added in to water used for watering plants, then the amount of leaves will decrease.Variables/ControlsThe dependant variable in the experiment is the amount of leaves on each plant, while the independent variable is the addition of sodium chloride and chromium chloride to water.The control group was the set of plants that were watered with plain water, and the test group was the other two sets of plants that were watered with a sodium chloride/ water mixture and a chromium chloride/water mixture.

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