To do the temperature and dissolved oxygen tests, stick the probe in the water, and it will show numbers. One will be the dissolved oxygen in ppm (parts per million) and the other will be the temperature of the water. To do the pH test, stick the pH paper in the water and compare the color it turns to the scale. To test nitrates, put clear water in a container and dirty water in another, and put powder in them. Shake them and then compare the color they turn to the scale.
The topic of research is, “how fast does an Alka-Seltzer tablet make gas?”. In the experiment, the scientists will be measuring the chemical reaction rates that occur, when 1 Alka-Seltzer tablet is placed in a specific temperature of water. The independent variable during the experiment will be the temperature of the water (degrees Celsius). The dependent variable during the experiment will be, the rate in which gas is produced (in seconds). The constants of the experiment, will be the amount of water used and the Alka Selter compound.
This has been a major contributor to the massive loss of life in the Chesapeake Bay waters. The average of phosphate tests were approximately zero and one tenth ppm (parts per million.) The lower the phosphate number, the smaller amount of pollution there is in the water. The average amount of nitrate in the water was approximately zero and nine tenths. The same scenario as the phosphate, the lower the number, the smaller amount of pollution.
For example, an experiment similar to this one could be how pressure could affect the time it takes for an Alka-Seltzer tablet to dissolve. Using A flask and rubber stoppers, you can compare the amount of time it takes for and Alka-Seltzer tablet to dissolve in regular room temperature water and room temperature water in a flak but with a rubber stopper stopping the air flow into the flask. This is related to the experiment performed above because the increase in pressure from the rubber stopper stopping the air flow in and out of the flask may affect the time it would take for the Alka-Seltzer tablet to dissolve. Another example of an experiment related to the one performed above is how the amount of water used to dissolve an Alka-Seltzer tablet effects the time it takes for one to dissolve. This also relates to the experiment performed above because it also affects how fast the rate of reaction is.
On our paper we predicted the amount of pennies that could fit in the boat before it sank. We tested the boat in the water and added pennies one by one. We then calculated the mass of pennies that fit in the boat and the density of it. The purpose of this Lab was to make a boat that holds as many pennies as possible and understand how to calculate
After the loop cooled down, the loop was usedd to obtain a sample of the unknown mixture. This done by inserting the loop in the test tube of the unknown mixture. The loop was now ready to begin streaking; the plate was divided into four quadrants. Streaking was initiated into the first quadrant using a side-to-side swipe method. After streaking into the first quadrant, place the loop through the flame for 3-5second in order to reduce the amount of bacteria
Students have to measure the distance between centers of the pole to the center of radial at the range of one. Use the length and diameter measurement to find out the radius of the rotation (R). After measuring the mass of the hanging mass, reattach the hanging mass to the string and attach the spring from the top of the cross arm. Before attaching the spring to the hanging mass, have to adjust the hanging mass to the pointed tip of the cross arm, it has to be exactly over the radial indicator.
In addition, phenolphthalein was added as an indicator. The aliquots were titrated against sodium hydroxide (NaOH) solution until end point was reached, after which volume of NaOH consumed was recorded. The value of the rate constant, k, obtained was 0.0002 s-1. The experiment was then repeated with 40/60 V/V isopropanol/water mixture and a larger value of k = 0.0007 s-1 was obtained. We concluded that the rate of hydrolysis of (CH3)3CCl is directly proportional to water content in the solvent mixture.
There, the algae in the water will use these substances to grow rapidly, and there will eventually be a high concentration of algae in the water. When the algae eventually dies, it is broken down by bacteria, which multiply and use up all of the oxygen
Number of bubbles produced in the water hyacinth is dependent variable because it increases when distance is less and decreases when distance is kept more. Control Variables: Control variables for this experiments are: Time: The light will be given to the plant for the time duration of 1 minute. It can be controlled by using stopwatch. It it is kept for more time it will produce more bubbles.
Purpose and Techniques: This experiment has the aim to determine a chemical formula of hydrated compound, which ingrains cupper, chloride and water molecules in its structure. In order to find this hydrated compound, it is necessary to use the law of multiple proportions. In other word, finding the appropriate variables values to this compound (CxCly*zH2O). Additionally, two major steps are required to proceed the experiment.
Water Pollution in San Joaquin Valley San Joaquin Valley is a place that stretches from 7 different counties such as Stanislaus to Kern county. San Joaquin Valley is known for their agriculture land since the late 19th century, which feeds most of the United States with the vegetables and fruits that are grown in the valley. The rich life of life in agricultural fields rely on the water supply that the valley contains such as groundwater and water on shore. Throughout the past decades, the water quality in San Joaquin Valley becomes to decrease from clean water to polluted water.