Lab 4 – Energy Sources and Alternative Energy Experiment 1: The Effects of Coal Mining |Table 1: pH of Water Samples | |Water Sample |Initial pH |Final pH (24-48 hours) | |Pyrite |5 |6 | |Activated Carbon |6 |7 | |Water |5 |5 | POST LAB QUESTIONS 1. Develop hypotheses predicting the effect of pyrite and coal on the acidity of water? a. Pyrite hypothesis = Pyrite will contaminate the water source making it more acidic. b. Coal hypothesis = Coal will contaminate the water source making it more acidic.
Lab 4 – Energy Sources and Alternative Energy Experiment 1: The Effects of Coal Mining |Table 1: pH of Water Samples | |Water Sample |Initial pH |Final pH (after 48 hours) | |Pyrite |6 |6 | |Activated Carbon |6 |7 | |Water |6 |6 | POST LAB QUESTIONS 1. Develop hypotheses predicting the effect of pyrite and coal (activated carbon) on the acidity of water? a. Pyrite hypothesis = The pyrite will probably dissolve a bit and increase the ph of the water b. Coal (activated carbon) hypothesis = The activated carbon will probably increase the ph of the water as it dissolves and releases chemicals into the water 2. Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1?
Lab 4 – Energy Sources and Alternative Energy Experiment 1: The Effects of Coal Mining |Water Sample |Initial pH |Final pH (24-48 hours) | |Pyrite |7 |4 | |Activated Carbon |7 |8 | |Water |7 |7 | POST LAB QUESTIONS Develop hypotheses predicting the effect of pyrite and coal on the acidity of water? Pyrite hypothesis = If the pyrite is left in a warm climate in water for 48 hrs, then it will have a higher pH then the initial Coal hypothesis = If the Coal is left in a warm climate in water for 48 hrs, then it will have a lower pH then the initial Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1? Explain how you determined this. Pyrite hypothesis accept/reject = Reject. According to the pH balance strips, my pyrite recorded a significantly lower pH of 4.
I realized that the lab did not include 2 aluminum cups used for the experiments so I decided to make them out of aluminum foil. I then measured the mass of one of the aluminum cups and recorded the data in the data sheet. I then added 2.0 grams of alum crystals into the aluminum cup and recorded the combined mass on the data sheet. I then set up the burner stand and burner fuel and prepared to heat the alum in the aluminum cup. I lit the burner fuel, placed it under the burner stand, and placed the aluminum cup containing the alum crystals on the burner stand.
2: First you measure the mass of the copper tacks and also try to get the mass of the water in the thermos as close to 0.1 kg since 1 dl of H20 = 0.1kg H20. 3: Using the test tube holder, sink the test tube with the copper in it into the 4: The electric kettle is now supposed to make the water boil and raise the temperature of the copper as close to 100ºC (T1cu) but it is not very likely that you will get exact 100ºC due to heat loss. This step will almost certainly take a couple of minutes. 4: Measure the temperature of the water in the thermos (T1w) and then add the tacks to the water in the thermos. 5: Now measure the temperature of the water (T2cu and T2w will have the same temperature).
Maria Ruiz English 101 Prof. Courtney Stanton Oct. 8, 2014 Sustainability and our Environment Our natural world is losing its essence of ‘natural’ to become a polluted and corrupted place. In Curtis White’s work, “A Good Without Light” and Jim Tarter’s work, “Some Live More Downstream than Others”; Tarter doesn’t mention a solution to our environmental crisis, but he presents his idea that science can be of great use to find the factors that create pollution, cancer and so on. White’s solution to this barbaric heart is that we have the power to stop it, but instead we are making the choice to hurt others. Overall these works show us the effects of how we suffer the consequences when the Barbaric Heart is violating our environment. White’s view on the barbaric heart promotes our own self-benefit, which links to Tarter’s view of living downstream.
Shelby McLenithan Honors Chemistry 12/1/10 STOICIOMETRY LAB Question= which compound will produce the most CO2 by heating of the following: * Calcium carbonate * Sodium bicarbonate * Copper (II) carbonate. Hypothesis= Calcium carbonate will produce the most Co2 by heating Stoichiometry: Variables: Dependent= amount of CO2 Independent= the reactants control= amount of reaction, same amount of heating ( 5 minutes) Procedure: 1. Measure out 1 gram of CO2 2. Heat CaCO3 for 5 minutes using th Bunsen burner 3. Find mass of CaCO3 after 5 minutes 4.
We recognize that the DNR assumes necessary precautions to prevent ecological hazards, and Farnsworth has done its best to maintain a clean, nonpolluting, and safe plant operation. However, it appears that different regional managers and different engineers are letting some companies off the hook. This inconsistent and unfair negligence may cause non-cited companies to slack, thereby perpetuating hazards to the environment. After a brief investigation of a number of companies, I found that the Richter Corporation, which is located in the same DNR region as Farnsworth, was approached about their fly ash dump as well. Jim Fleshman, the company’s chief environmental engineer, informed me that while they too have been pressured to move to a Type II fill, they have neglected to do so.
The command and control approach typically relies on detailed regulations followed by an ongoing audit and inspection program. Command and control regulations have some benefits. One example is in a situation in which the pollutant is highly toxic, yet the public concern would outweigh any economic efficiency concerns. Another example occurs when the reduction in the amount of pollutant benefits a society. An example of a disadvantage includes attempting to keep technology current with the most effective methods.
The principle applies to the environment and human health. As humans we are responsible to protect and restore the global ecosystems in which life is depends on. The precautionary principle helps us determine if we need to take action before science dictates or assume what harm could occur. History has shown that while assumptions were made about health risks, science wasn’t able to make an exact determination before disease and death. The precautionary principle loses its affect if it only results in bans or moratoriums.