Decomposition of copper sulfate pentahydrate (CuSO4●5H2O) Introduction: By now, you are aware that scientists apply heat to substances in order to decompose them. In this lab, you will apply heat to make copper sulfate pentahydrate (CuSO4●5H2O) undergo a decomposition reaction. You will make observations and will have to make an educated claim about the products of the decomposition reaction. Furthermore, you will have to use your observations as evidence and will have to discuss your reasoning about why your observations support your claim. 1.
According to the article “How Tap Water Became Toxic in Flint, Michigan,” written by Sara Ganim and Linh Tran, the residents of Flint, Michigan highly disapproved of the new water source. Around 2 years ago, the city of Flint was forced to switch their water supply from Lake Huron to a more local source, Flint River. Before, this was not a big problem to the residents of Flint because they were told that the water they were drinking was harmless. However, people began to doubt that the water they were drinking was safe because it looked like sewage. Over time, new evidence began to arise claiming that the water contained massive amounts of lead and iron.
For this titration, one drop of EBT indicator, NH4Cl buffer, and the water sample were added to each well in a 1x12 well strip. Once each well was filled, the titration proceeded: one drop of the 2 x 10-4 M EDTA was added to the first well, two drops to the second, three drops to the third, etc. Once one of the wells turned a blue color, that particular well represented the point at which there was excess EDTA and all of the Mg2+ combined with the EDTA to remove the ions from solution and form the chelate. Following the test, the equation MEDTAVEDTA= MCa2+VCa2+ was used to calculate the Ca2+ and Mg2+ concentrations.1 Similar to the previous AA test, the water sample was diluted with a 1:1 ratio along with the Atherton and Virginia samples.
Cadwallader C. Washburn was born on April 22, 1818, on a small farm in Livermore, Maine. (Service) He was raised as the middle child of ten children, seven of which being boys. Having the family library located near his home, Cadwallader was fairly well educated and well-read for his time. Knowing that he, as the middle child, would not receive the family farm, Washburn decided to leave home shortly after he turned eighteen.
In the book, “Crispin The Cross Of Lead” by Avi, Crispin’s experiences which have had a very impactful effect on his world due to changes which have caused him to be more content with his life, more lonely, and more self-dependent. After a very prolonged dreadful journey with countless number of hours Crispin keeps on asking himself questions about his existence. As Crispin wanders off into the unknown lands he comes across a warning from god in the shape of a corpse blocking his path, he ponders “Except-as Jesus is my savior-as sure as my heart understood anything-I knew then how much I wished, not to die, but to live”(65). Crispin all these years has been blindfolded from all the opportunities waiting to be opened because to this point he
Crispin: The Cross of Lead is a story about a 13 year-old boy who lives with his mother in the small village of Stromford, which is ruled by Lord Furnival. After his mother’s death, he runs away and overhears John Aycliffe the village steward discussing "a great danger. " The steward sees Crispin and tries to kill him, but Crispin escapes. Crispin seeks out the village priest for help, but instead finds out that he has been declared a "wolf's head," which means that anyone can kill him.
What we are trying to find out is more about the law of conservation of mass. The way we are trying to figure this out is by doing an experiment called the Copper Cycle which is where you start with copper and add many different chemicals and lots of process where the copper is no longer visible. We wanted to see for ourselves what happens to copper when we made many chemical changes and in the end what happened to zinc when the copper appeared. What we found out at the end is that the copper appeared again which tells us that the copper never left and was never destroyed. What we also found out that the zinc did not leave but it dissolved into the solution and displaced copper forcing it back into copper solid.
From the book Crispin the Cross of Lead by Avi, the 13 year old protagonist Crispin started off as a runaway from his home in Stromford Village after his mother died because he was wrongly accused of thievery, thus resulting in him being declared a wolf’s head. While on the run Crispin met Bear, who challenged him, protected him, and taught him. In the end, Crispin’s new self was challenged as he risked his life to save Bear in Great Wexley. Throughout the story Crispin matures tremendously, starting off as timid and sinful, then growing to question his background and be more courageous, and finally becoming free and brave.
Worksheet 6 (Part2) Microbiology In section 2 of worksheet 6 you will be asked to answer a series of short answer, critical thinking and case study questions. Please consider each question carefully and then answer in your own words. Below is the rubric that will be used to evaluate your answers.
rtists dating back to the Prehistoric times, attempted to create human figures. They differ in their reasoning for making them, as well as the style of each one. The Cycladic, Female Figure, 2500-2400 B.C.E., and the Classical, Doryphoros 480-400 BCE by Polykleitos both are examples of how different human statue styles and purposes change between periods. Culture of the Cycladic time period, 2500-2400 BCE, is widely unknown. However, what is known about the Cycladic culture came from Homer's Iliad and the Odyssey.
Water Pollution: Harming the Human Health The release of chemicals affects water pollution in the Chesapeake Bay, affecting the health of the human population. There are several chemicals which are more common in the Chesapeake Bay than others. A growing concern for the Bay is the amount of nitrogen and phosphorus there is since it continues to grow each year.
Crispin, The Cross of Lead, by Avi tells the story of a 13 year old boy who after his mother dies, is forced to run away to avoid being killed. While running away he meets Bear, who is a juggler and has very different ideas than what is customary to Crispin and many other Serfs in the Middle Ages. Crispin and Bear make their way to Great Wexly where they see Crispins greatest fear, the steward who has unjustly declared him a ‘wolfs head.’ With the help of Bear, Crispins ‘new self’ is able to face his fears and accomplish his dream becoming an independent man with Bear. As the events of the story complicate, Crispins character develops.
In 1963, the government assigned some research groups under the Ministry of Health and Welfare and the Ministry of Education to conduct a study about the disease. In January 1967 the joint research group confirmed that cadmium was one of the causes of the disease together with other possible reasons. The group of victims was disappointed by this unclear conclusion of the government research group and decided to file a case against the responsible company, Mitsui Mining & Smelting Co., Ltd., as well as against the government in March 1968. On 8th of May 1968, the Ministry of Health and Welfare admitted that the disease was caused by cadmium poisoning and the only possible source of the cadmium was the effluent from the Kamioka mine of the Mitsui Mining& Smelting Co., Ltd.
Unlike mercury and lead, arsenic is a metalloid; and in some food source; like rice; the biggest problem. Arsenic is toxic and carcinogenic, it is highly abundant in nature with a mean availability of 5mg/kg soil within earth’s crust (Manvi Singh, 2013). One of the reason arsenic is abundant in the soil and water is because of mining of coal and other metals. Therefore arsenic contamination has a widespread reach, in regards to food consumption it not only contaminates sea-based food, but also land-based. Arsenic by soil and water contamination therefore can lead to a direct contamination in agricultural practices and provide health risks.