Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction
PLANNING –
Title – Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction.
Introduction – The rate of reaction can be defined as the speed at which a reaction takes place. The rate of reaction tells us how quickly a chemical reaction has happened. There are many things that can affect the rate of reaction, (some of these are shown in figure 1 below.) In this coursework I am going to investigate what effect the change in acid concentration has on a chemical reaction. I will do this through a series of experiments, where I will change the concentration of hydrochloric acid by mixing it with water. I will measure the reaction by recording the amount of gas given off in 60 seconds for each experiment. I plan to keep the total amount of liquid used in the experiments at a constant 20ml. This way I can measure the concentration of the acid I use each time.
Aim – To find out if the rate of reaction is effected by the concentration of an acid.
Variables – I have decided to focus on the effect concentration of acid has on the rate of reaction. To get accurate results, I have to make sure all my experiments are run fairly. To achieve this I will keep all my variables constant, except the one I’m investigating, the concentration of the acid.
The temperature, equipment and amount of substances I use will be kept the same for all my experiments. I will also make sure the substances
I use are all prepared in the same way before each experiment. This will avoid change in surface area. (E.g. I wont crush a substance one time and keep It whole the next) In all my experiments I will keep the magnesium whole. To control the temperature of the acid, I will use a thermometer to monitor it and make sure the temperature is the same for each experiment I do. (this will most likely be at room temp. around 27degrees.) All my equipment will be kept identical to any other one of my experiments, and I will use the same size measuring cylinder (20ml) to measure out the acid and water.
The concentration of the acid is the only variable I will change throughout my investigation. I will do this by weakening the solution with water, starting with a very acidic solution and gradually diluting it. This will be done by measuring the water and acid in the
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.
One of the most recently new advances in radiology is the use of magnetic resonance imaging (MRI). MRI has been around for the past century. It was at first called Nuclear Magnetic Resonance (NMR) and then it changed to MRI once there was an available image. Walter Gerlach and Otto Stern were the first scientists to start experimenting with the magnetic imaging. Their very first experiment was looking at the magnetic moments of silver by using some type of x-ray beam. The scientists then discovered this was by realizing that the magnetic force in the equipment and in the object itself. In 1975, the first image was finally created using and MRI machine. The scientists used a Fourier Transformation machine to reconstruct images into 2D. The first images ever use diagnostically was in 1980. This is when hospitals began to use them. At first the images took hours to develop and were only used on the patients that needed it most. Even though MRI has been around for a long time, it has advanced and has been one of the best imaging modalities recently (Geva, 2006).
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Student binge drinking has been receiving increasing attention in colleges in recent years. In “A Systematic Review of Interventions Aimed at Reducing Binge Drinking among College Students,” the author Bridge and Sharma state, “The consumption of alcohol results in many health and safety concerns that include personal, social, and economic consequences for individuals, their families, communities, and the nation” (26). College student’s high-risk drinking behavior can cause death, unintentional injuries, assaults, sexual assaults, inadequate academic performance, unprotected sex, and colleges are seeking to create programs and accessible intervention
There are multiple causes for hyperthyroidism. According to the Merriam Webster website, hyperthyroidism means excessive functional activity of the thyroid gland; also resulting condition marked especially by increased metabolic rate, enlargement of thyroid gland, rapid heart rate and blood pressure. Thyroid gland is a part of the endocrine system and is located right below the Adams apple. The endocrine system is very important to the human body. The function of the endocrine system is to coordinate and integrate cellular activity within the whole body by regulating cellular and organ function throughout life and maintaining homeostasis. Homeostasis, or the maintenance of a constant internal environment, is critical to ensuring appropriate cellular function. For example, maintaining body temperature, weight management and heart rate. However, when the homeostasis of the internal environment isn’t maintained, pathologies associated with hyperthyroidism can develop. There are multiple diseases associated with hyperthyroidism, Graves’ disease, excessive intake of iodine and mulitnodular goiter. The function of the endocrine gland is to secrete hormones in the internal body. For example, thyrotropin-releasing hormone is released by the hypothalamus to the anterior pituitary gland, which releases thyroid-stimulating hormone (TSH) and binds to TSH receptors on thyroid gland. This leads to the production of triiodothyronine (T3); thyroxine (T4). Certain pathologies increase the production of T3 and T4 leads to hyperthyroidism. Hyperthyroidism is also known as overactive thyroid is caused by excessive production of T4 and T3 in the thyroid gland. This will significantly lead to changes in the internal homeostasis causing sudden weight ...
Each year alone, 1,825 people from the age of 18 to 24 die as a result of accidental alcohol-related injuries (“College Students and Binge Drinking”). Sadly, that number is only getting higher and more young lives are going to waste along with their potential. College students don’t realize that the amount that they drink is way more than the actual serving size. If a man has 5 or more drinks and a woman has 4 or more in 2 hours, that is considered binge drinking. This is considered normal for college students and that needs to change. They are not only damaging their bodies, but drinking like this could cost them their life. Colleges need to work more with students to regulate binge drinking on campus by enforcing punishments when students are caught, educating them about the dangers of binge drinking in their general education requirements and disallow the
... of some subjects.” ( Arnold, P. 2014 ). This unreliability of genetic engineering in humans ultimately poses the question, do the benefits outweigh the risks?
Binge or excessive drinking is the most serious problem affecting social life, health, and education on college campuses today. Binge or excessive drinking by college students has become a social phenomena in which college students do not acknowledge the health risks that are involved with their excessive drinking habits. Furthermore college students do not know enough about alcohol in general and what exactly it does to the body or they do not pay attention to the information given to them. There needs to be a complete saturation on the campus and surrounding areas, including businesses and the media, expressing how excessive drinking is not attractive and not socially accepted.
The problem here is that students at college campuses across the United States, are binge drinking at an alarming rate. Yearly, students hurt themselves and others due to their alcoholism. Unfortunately, despite this being such a prominent problem, the research on this topic is not as extensive as it should be. It may seem that alcoholism is simply a small problem, and it is quite possible that it once was. But, when you have crimes being committed when students are blacking out and punch bowls being spiked so that students can drink only to wake up with their head in the toilet the next morning, it becomes clear that this is no longer an individual problem. Binge drinking is a problem and I would like to provide solutions. To do that, I first need to conduct extensive research at Big Name University on binge drinking amongst men and women here in order to find the problem, target the problem, and provide a plausible solution.
I blanked it with 2 cm³ water, 1 cm³ amylase and 3 drops of iodine.
Investigating the Effects of Temperature on the Rate of Reaction between Magnesium and Hydrochloric Acid Introduction Chemical kinetics is the study and examination of chemical reactions regarding re-arrangement of atoms, reaction rates, effect of various variables, and more. Chemical reaction rates, are the rates of change in amounts or concentrations of either products or reactants. Concentration of solutions, surface area, catalysts, temperature and the nature of reactants are all factors that can influence the rate of reaction. Increasing the concentration of a solution allows the rate of reaction to increase because highly concentrated solutions have more molecules and as a result the molecules collide faster. Surface area also affects reaction rate because when the surface area of a reactant is increased, more particles are exposed to the other reactant.
According to National Institute on Alcohol Abuse and Alcoholism, more than 1,800 college students die from alcohol-related causes every year, while about 800,000 are being assaulted by other students because of drinking. About one in every four college students who binge drink also admit that they have experienced academic problems. Binge drinking is drinking multiple drinks in just a few hours to get drunk. Despite the fact that college drinking has caused many issues, it has not been stopped, yet. In article, “Why Colleges Haven’t Stopped Binge Drinking,” McMurtrie (2014) explains that this issue has not been resolved yet because many people still see alcohol abuse as general issue instead of seeing it an individual behavior. Because colleges
...causes of human deaths. By using this method to stop the transmission of mosquito to human, the human death count will decrease considerably. Even though this article is short, it offers a large amount of useful information that will be valuable in assessing the benefits that this type of genetic modification will have for the advancement of therapeutic medicine. This article is both valid and reliable as the information it provides is relevant to my research topic. The article is found on the Johns Hopkins Malaria Research Institute’s website, this is a highly reliable source as Johns Hopkins is a world renowned research institute who’s authors are widely published and are scientifically correct. This article is also is recent as it was only published in 2012, this proves that this research is up-to-date and has great relevance in the scientific research sector.
It all started with the creation of The Abacus which is calculating device is invented 5 millennium in Asia and which is still being used until today, it’s known as the first computer. This device allows users to make calculations using sliding beads arranged in a rack form. Only after about 1200 years, next adv...
Rate of Reaction - Sodium Thiosulphate and Hydrochloric Acid. Aim Investigation, to find out how the rate of reaction between sodium thiosulphate and hydrochloric acid is affected by changing the concentration. Introduction I must produce a piece of coursework investigating the rate of reaction, and the effect different changes have on them. The rate of reaction is the rate of loss of a reactant, or the rate of development of a product during a chemical reaction. It is measured by dividing 1 by the time taken for the reaction to take place.