Sodium Thiosulphate & Acid Planning To ensure that this experiment is safe, I have taken some precautions. I wore goggles at all times, made sure not to spill any chemicals such as the acid onto skin or clothes, and to be aware of glass. I have used various different apparatus, including two measuring cylinders, one 25ml, and the other 50ml. I used a 150ml chronicle flask and a stopwatch. Here is a few diagrams of these apparatus. What I Will Vary, Not Change To Keep A Fair Test & What I Will Observe & Measure I will vary the amount of Sodium Thiosulphate (10-50ml), but keeping the same amount of Hydrochloric Acid (25ml) to make it a fair test. Also when I vary the amount of Sodium Thiosulphate, I will always keep the same total volume of the mixture, therefore topping it up to 75ml every time. I will be observing the reaction of the two chemicals, and measure how quickly the sulphur is produced. I will also keep the start temperature the same. What Will I Try To Find Out I am going to find out how long it takes for Sodium Thiosulphate ( ) to react wit Hydrochloric Acid (HCL) to produce Sulphur so you can no longer see through it (opaque). To do this I will use paper with writing on, and wait until I can no longer read it, because the solution will turn 'milky.' My Prediction The stronger the solution, therefore the more Thiosulphate particles, the quicker the reaction because; there will be more particles in the solution to react with the Hydrochloric Acid, with a bigger percentage chance of reacting/hitting it. This is because if there is more particles in the total substance of 75ml, there is less surface area free. Twice the amount of particles, in the same total volume, means twice the chance of collision therefore in theory half the time on reaction, due to a high concentration. This is the 'Collision Theory.' This means that my overall prediction is that when the strongest amount of Sodium Thiosulphate is added to the Hydrochloric Acid, it will react faster. This also, proved above means that I will not need to add water, so preventing dilution. Diagram Proving Prediction Method 1. Measure out 25ml of Hydrochloric Acid (Hcl) - keep the same every time. 2. Measure out the needed amount of Sodium Thiosulphate ( ) in a cylinder 3. Pour ( ) into a chronicle flask 4. Place paper with writing on under flask 5. Add Hcl, as soon as it mixes with the ( ), start the stopwatch 6. As soon as the solute has finished reacting, and the writing is no
In order to achieve my main aim, I will firstly have to test my prior
Experiment is to investigate the rate of reaction between hydrochloric acid and calcium carbonate Hydrochloric acid + Calcium Carbonate Þ Calcium Chloride + Water + Carbon Dioxide 2HCl (aq) CaCo3 (s) CaCl2(s) H2O (aq) CO2 (g) There are a number of variables in this experiment and these are listed below as input variables and outcome variables.
Neurons are the cells that create brain activity, passing chemical and electric signals from on...
Mabillard, Amanda. "Shakespeare in Print." Shakespeare Online. N.p. 20 Aug. 2004. Web. Web. 25th of April
In 1564, a man was born by the name of William Shakespeare. He was born to a poor family, was given little education, and had no interaction with sophisticated society. Thirty-eight plays and over 150 sonnets are not attributed to this ignorant man. Those who believe that Shakespeare was the author have no definitive proof but instead point to Hamlet’s declaration: "The play’s the thing(Satchell 71)." The true author, however, lies hidden behind he name of Shakespeare. Edward de Vere the premier Earl of Oxford is not only considered a great poet in history, but he may also be the great playwright who concocted the sonnets and plays which are now attributed to William Shakespeare of Stratford, England.
Chemistry teacher, Don Butterfingers, spills sulfuric acid in his room during an experiment. Many student claim he doesn’t follow safety protocol.
Shakespeare, William. The Norton Shakespeare. Edited Stephen Greenblatt et al. New York: W. W. Norton & Company, 1997.
Dutton, R., & Howard, J.E. (2003). A Companion to Shakespeare’s Works.(p. 9) Maiden, MA: Blackwell Pub.
A divergent set of issues and opinions involving medical care for the very seriously ill patient have dogged the bioethics community for decades. While sophisticated medical technology has allowed people to live longer, it has also caused protracted death, most often to the severe detriment of individuals and their families. Ira Byock, director of palliative medicine at Dartmouth-Hitchcock Medical Center, believes too many Americans are “dying badly.” In discussing this issue, he stated, “Families cannot imagine there could be anything worse than their loved one dying, but in fact, there are things worse.” “It’s having someone you love…suffering, dying connected to machines” (CBS News, 2014). In the not distant past, the knowledge, skills, and technology were simply not available to cure, much less prolong the deaths of gravely ill people. In addition to the ethical and moral dilemmas this presents, the costs of intensive treatment often do not realize appreciable benefits. However, cost alone should not determine when care becomes “futile” as this veers medicine into an even more dangerous ethical quagmire. While preserving life with the best possible care is always good medicine, the suffering and protracted deaths caused from the continued use of futile measures benefits no one. For this reason, the determination of futility should be a joint decision between the physician, the patient, and his or her surrogate.
Although William Shakespeare is considered to be one of the most revered and well-renowned authors of all time, controversy surrounds the belief that he actually produced his own literary works. Some rumors even go so far as to question the reality of such a one, William Shakespeare, brought on by paralleling the quality of his pieces with his personal background and education. With such farfetched allegations, it persuaded others to peek into the person we all are taught to learn as “Shakespeare”, but who is actually the person behind these genius works of literary promise and enlightenment? To some, Shakespeare is as much accredited to his works as frequently as you see his name placed. To others, Shakespeare is a complex enigma into which we the people are supposed to unravel; the true author behind a falsely-given pseudonym. The debate pertaining to the true authorship of William Shakespeare’s works are still questioned in today’s society.
Cohen, Walter, J.E. Howard, K. Eisaman Maus. The Norton Shakespeare. Vol. 2 Stephen Greenblatt, General Editor. New York, London. 2008. ISBN 978-0-393-92991-1
How does a person increase their chances of heart disease, stroke and peripheral artery disease all in the same way? By having increased cholesterol levels (Wedro, 2014). It is estimated that 71 million Americans have high cholesterol, and of those, only one-third of them have it under control (CDC, 2011). A reduction in LDL cholesterol has been shown to decrease the prevalence of strokes and heart attacks. That being said, it has also been shown that cholesterol levels above 200mg/dL put an individual at twice the risk for coronary heart disease than persons with levels 180mg/dL or less (Mann, 2014). There are numerous risks associated with high cholesterol, luckily many factors that can help control it such as medications, exercise and nutrition (Filho, 2013). Exercise training has been supported to show improved changes in blood lipid panels (Greene, 2012). This paper is going to analyze the effects that exercise and diet can have on lowering total cholesterol, LDL cholesterol, and triglycerides, as well as looking into ways that can help to increase levels of HDL cholesterol. Maintaining cholesterol in the recommend range has been shown eliminate 20,000 myocardial infarctions and 8,000 deaths each year. Saving money is not as important as life saving tactics, but studies suggest that controlled cholesterol could reduce billions of health care costs that are related to elevated cholesterol levels annually (CDC, 2011). Elevated cholesterol levels are associated with limited access to health care; therefore looking into areas of lifestyle changes for health care benefits that are low cost and effective would be valuable (CDC, 2011).
Hydrochloric acid + calcium carbonate arrow calcium chloride + carbon dioxide + water. HCl(aq) + CaCO3(s) arrow CaCl2(aq) + CO2(g) + H2O(l) Things that affect the reaction rate of this experiment are: 1. The temperature of the hydrochloric acid. 2.
The ph scale can be used to determine how strong an acid is. One meaning the acid is very strong and six meaning the acid is very weak. Some examples of acids are in the table below
My aim in this piece of work is to see the effect of temperature on the rate of a reaction in a solution of hydrochloric acid containing sodium thiosulphate.