Today, I discovered my own love for Chemistry! The Chemistry Matters Symposium at Centre College is an opportunity for students to share their knowledge about Chemistry. I realized that the purpose of the symposium is to explore and to help students realize how Chemistry affects nearly everything and everyone in the whole world. I report to you about how Chemistry affects the brutalities of war, the water we drink, and the oxygen we breathe.
Landmines are a dangerous war tool. They are explosive devices placed just beneath the ground with the purpose of blowing up any person, vehicle, or animal that steps on the and triggers the device to set off. Landmines are used as a war tactics because they are cheap, easy to improvise, kill effectively and indiscriminately, and require to upkeep. Landmines explode by setting off a Chemical reaction using trinitrotoluene (TNT) in its solid state. The Chemical equation is: 2 C7H5N3O6 –> 3N2 + 5H20 + 7CO + 7C. An explosion occurs only when weight is placed on top of the device. The pressure from the weight ignites the firing pin to cause a chemical reaction. The TNT decomposes to release a shockwave explosion of dinitrotoluene (DNT). More specifically, the boom, the explosion, is causes when Nitrogen gas molecules combine to form a strong triple bond. The exothermic bonds release a huge amount of energy and heat. Current countermeasures are being taken to remove hundreds of thousands of active landmines from current and previous war zones in Central America, South America, Western Europe, and the Middle East. Mine sweepers act as metal detectors and K-9 units sniff out DNT. How cool is it to learn about Chemistry causing a huge explosion!
The Quest For A Clean Drink
Nearly one billion people world wide do not have access to clean drinking. Their alternative is well water or ground water that is contaminated with bacteria, microbes, arsenate, and arsenite. Drinking harmful bacteria may lead to disease and the possibility of death. Drinking microbes may lead to skin cancer with the possibility of death. Drinking arsenate and arsenite, a toxic chemical, leads to immediate death. The detrimental problem of contaminated drinking water affects populations in Eastern Asia. Luckily, a team chemists has proposed three procedures for eliminating toxic arsenate and toxic arsenite from water. The first method is using buckets to make filters. The filter of the buckets contains a composite iron matrix, which filters out arsenic by means of a chemical reaction: FeOH + H2AsO4 ➞ FeOAsO3H+ H2O and FeOH + HAsO42 ➞ FeAsO42 + H2O. The toxic arsenate ions are filtered out because they are attracted to the negative hydroxide ions. The second procedure is removing arsenic with a pump. The stainless steal pump uses a substance called adsorbent alumina, a polymer, which catches arsenic as the ground water is filtered through the pump and comes out to be more safe drinking water.The chemical equation is: 4Fe2+ +O2 +10H2O➞4Fe(OH)3 +8H+. The third method is an arsenic removing powder. The powder goes through three process, known as coagulation, flocculation, and disinfection, in order to remove arsenic and kill bacteria within the water. Thanks to these newfound chemical processes, the lives of billions of people worldwide are saved from contaminated drinking water.
“Hitting The Wall” – Running A Marathon
A Final example of Chemistry at work is aerobic and anaerobic respiration. If you are a runner, you have experienced both aerobic and anaerobic respiration. If you are a marathon runner, you have experienced “Hitting a Wall” when you body switches from aerobic to anaerobic respiration. Aerobic respiration is explained by the chemical formula, C6H12O6 + 6O2 –> 6CO2 + 6H2O + energy. Everyone, not just runners, undergoes aerobic respiration when your body burns the stored glucose and glycogen in your body to create energy. On average, a person can store up to 2,000 calories of glycogen. A runner therefore, can run 20 miles, burning on average 100 calories a mile, before glycogen stores are depleted in one body and before aerobic respiration ceases. Marathon runners undergo anaerobic respiration, when they hit mile twenty. During Anaerobic respiration, your body uses the fat storage to create energy. A runner will grow extremely tired at this point in the race because they must breathe in four times as much oxygen to create energy through anaerobic respiration. To resolve this problem, runners carload, consume in race carbohydrates, and elite runners are able to store increased levels of oxygen in their lungs with time and training.
In conclusion, giving a chemistry matters talk heightened my interest in the field of Chemistry and improved my own knowledge and how to give an effective, informative, and captivating presentation. From the other presenters I learned to be engaging by showing excitement and personal connection with my topic of choice. I also learned how to be time effective by giving a five minute presentation, but to be precise and thorough in explaining the topic and its significance.