Monday, January 27, 2020

Reaction Rate of Hydrochloric Concentration

Reaction Rate of Hydrochloric Concentration Hydrochloric Intensity The purpose of the experiment was to gather an understanding for the chemical reactions, depending on the concentration. The rate of reaction is the speed of the chemical reaction. This experiment was to justify if the concentration is high or low will it affect the chemical reaction. Hydrochloric acid constitutes the majority of gastric acid, the human digestive fluid. In a complex process and at a large energetic burden, it is secreted by parietal cells (also known as oxyntic cells). These cells contain an extensive secretory network (called canaliculi) from which the HCl is secreted into the lumen of the stomach. They are part of the epithelial fundic glands (also known as oxyntic glands) in the stomach. The chemical compound hydrochloric acid is the aqueous (water-based) solution of hydrogen chloride gas (HCl). It is a strong acid, the major component of gastric acid and of wide industrial use. (LibreTexts. 2017). It is said from (chem4kids.com. 2017) if a reaction has a low rate , that means the molecules combine at a slower speed than a reaction with a high rate. The collision theory was used to envisage the rate for a chemical change, collisions dont always have a chemical reaction. A chemical reaction needs to be equalized for it to have an effective collision. According to (Chemistry LibreTexts. 2017) A collision will be effective in producing chemical change only if the species brought together possess a certain minimum value of internal energy, equal to the activation energy of the reaction. Furthermore, the colliding species must be oriented in a manner favorable to the necessary rearrangement of atoms and electrons. (askllTians. 2017) The experiment that was used, was all 5 test tubes filled with the same amount of sodium thiosulfate and adding to each different test tube different concentrations of hydrochloric acid and timing how fast the reaction rate is. This experiment was used to find out if you had different concentrations of hydrochloric acid would it affect the rate of reactions. Na2O3S2 + HCI = SO2 Sodium thiosulfate +Hydrochloric acid = sulfur dioxide The chemicals in this experiment were Hydrochloric acid and Sodium thiosulfate. Research has shown about hydrochloric acid it is a component found in the human digestive fluid from (Hydrochloric acid. 2017) it says that Hydrochloric acid constitutes the majority of gastric acid, the human digestive fluid. In a complex process and at a large energetic burden, it is secreted by parietal cells (also known as oxyntic cells). These cells contain an extensive secretory network (called canaliculi) from which the HCl is secreted into the lumen of the stomach. They are part of the epithelial fundic glands (also known as oxyntic glands) in the stomach. The chemical compound hydrochloric acid is the aqueous (water-based) solution of hydrogen chloride gas (HCl). It is a strong acid, the major component of gastric acid and of wide industrial use. If the human digestive fluid had a low concentration it would take longer to digest food. Concentration is the intensity of an element or substance in an experiment. Concentration is used in everyday life in food, drinks and chemicals added to certain things. Aim The Aim for this experiment was if the concentration would affect the rate of reaction. Hypothesis The prediction for this experiment was that the reaction time will get faster and slower with each density of hydrochloric acid. Hydrochloric acid and sodium thiosulfate will mix together and create a yellow substance of solid Sulphur. The controlled variable in this experiment was the concentration and the independent variable was the rate of reactions. 5 test tubes 2 measuring cylinders (50ml each) 5 different types of hydrochloric acid such as 0.2,0.5,1.0,1.5,2.0 (50ml each) 1 sodium thiosulfate 75ml 1 test tube rack Gloves Glasses Lab coat 3 stop watches This experiment started by the collection of the resources and safety equipment needed. Followed by the set up of the test tubes in the test tube rack and the measuring of 5ml of Sodium Thiosulfate for each of the test tubes. 15ml of Hydrochloric Acid of different concentrations ranged between 0.2 to 2.0 added to each test tube as soon as the hydrochloric acid is added the timer was stated and the experiment was observed till there werent any more changes to the chemicals. When the chemicals first had a change the time from when the hydrochloric acid added to the change was recorded into a results table. Once there was no change to the chemicals, the times was also recorded. The experiment was done three times to make sure there were the best results we could get and incase the results werent precise. After the third round of the experiments were finished the equipment used was cleaned up and the area used and all the resources and safety equipment used was returned. Diagram Risk assessment Basic steps for experiment Risks (low, moderate, high) prevention grabbing equipment from the trolley and placing it out It is at a low risk of bumping into people and dropping all the equipment To prevent this risk, you will need to walk safely to you working area and be careful with the equipment When measuring the sodium thiosulfate to put in each test tube It is at a low risk of spilling the chemicals To prevent this risk, you will need to be aware of people around you and keeping an eye on what you are doing When measuring the hydrochloric acid to put in each test tube for the first round of experiments It is at a low risk of spilling the chemicals To prevent this risk, you will need to be aware of people around you and keeping an eye on what you are doing The combination of the hydrochloric acid and sodium thiosulfate into the same test tubes It is at a low risk of spilling the chemicals To prevent this risk, you will need to be aware of people around you and keeping an eye on what you are doing Viewing the reaction It is at a moderate risk you may be injured by the reaction the chemical pose To prevent this risk, make sure you have put in the right amount of chemicals and dont be so close while viewing the reaction After repeating the experiment 3 times the area and equipment used will need to be cleaned and washed It is at a moderate risk spilling the chemicals on yourself will cause burning or irritation to the skin or dropping the test tubes and breaking them To prevent this risk, ware protective gear such as groves, glasses and apron it will protect most of your body at may come in contact with the chemicals Writing your results It is at a low risk the most that can happen is stabbing yourself with a pencil or pen. To prevent this risk, be careful The health effect the chemicals have: Chemical Effects Hydrochloric acid When in contact with skin, your skin will become corrosive, irritant and it will create burns on your skin. Eye contact it will become irritant and corrosive. Sodium thiosulfate Your skin will become irritant. results Experiment 1: Mol Before after reaction 0.2 Clear Change to a creamy white 51sec-6.45min 0.5 Clear Change to a creamy white 48sec-4.54min 1.0 Clear Change to a creamy white 1.10min- 2.28min 1.5 Clear Change to a creamy white 1.20min-2min 2.0 Clear Change to a creamy white 1.15-2min Mol Before after reaction 0.2 Clear change to a creamy white 51sec-6.45min 0.5 Clear Change to a creamy white 33sec-4.53min 1.0 Clear Change to a creamy white 26sec- 2.42min 1.5 Clear Change to a creamy white 18sec-2.25min 2.0 Clear Change to a creamy white 58sec-3.3min Experiment 2: Experiment 3: Mol Before after reaction 0.2 Clear change to a creamy white 41sec-3.15min 0.5 Clear Change to a creamy white 38sec-2.36min 1.0 Clear Change to a creamy white 0.06sec- 1.49min 1.5 Clear Change to a creamy white 45sec -1.27min 2.0 Clear Change to a creamy white 10sec-2.11min Discussion In experiment 1, it started with the clear mixed chemicals all with different concentrations of hydrochloric acid. In the experiment for 0.2M the reaction occurred 51 seconds after combining sodium thiosulfate and hydrochloric acid together and the reaction stopped 6.45 minutes after the combining. The hydrochloric acid with a concentration of 0.5M the reaction occurred 33 seconds after the combining and stopped 4.53 minutes after. 1M was 25 seconds and stopped at 2.42 minutes after, 1.5M was 18 seconds and stopped after 2.25 minutes after and finally 2M the reaction started at 58 seconds after it was combined and it stopped 3.37 minutes after the combining. Although all the concentrations of hydrochloric acid, the clear liquid it once was changed to a creamy white. In experiment 2, it started the same way as experiment 1. Although some of the results were different to experiment 1. O.2M it started at 51 seconds and stopped at 6.45 minutes after, it was the same as in experiment 1. The chemical reaction started at 33 seconds and it stopped 4.53 minutes whereas 1M started at 26 seconds and it stilled at 2.42 minutes after it was added. 1.5M was started at 18 seconds whereas 2M started at 58 seconds but 1.5M stopped at 2.25 minutes and 2M stopped at 3.3minutes. However, all the concentrations in the end change to the same color in experiment 1. Experiment 3, just like all the other experiment it was started the same way with the clear mixed chemicals however, the chemical reaction happened when the sodium thiosulfate was being measured because it was accidently measured in the hydrochloric acid measuring cylinder so that effected the results for this experiment, so it was measured when it got to a darker shade of creamy white. 0.2M was affected 41 seconds after and it stopped 3.15 minutes after. 0.5 changed 38 seconds after and it stopped at 2.36 minutes.   1M was the one that was most effected when measuring the sodium thiosulfate occurred it was recorded in the results that it started at 0.06 seconds and stopped at 1.49 minutes. 1.5M started at 45 seconds and finished 1.27 minutes after finally 2M started at 10 seconds and stopped 2.11 minutes. The Average, when the recording was happening there wasnt someone all the time watching the experiment so it may not be quite accurate. The average for 0.2M was 5.35 minutes, 0.5M was 3.81 minutes, 1M was 4.58 minutes, 1.5M was 4.02 minutes and finally 2M was 2.47 minutes. This average was only recorded by when the chemical changed stopped. The research collected helped understand what was going on with the experiment it was known if it had a low concentration is would go slower and it would go faster if it had a high concentration. The Hypothesis was supported it did get faster and slower with each density of hydrochloric acid. Although it didnt create a solid yellow substance, the experiment only created a liquid substance. This experiment has created a understanding of what would happen if the human digestive fluid has a much higher concentration it would help digest quicker but it would also eat the lining of your stomach. Evaluation This experiment worked well but there were many mistakes that occurred such as the results were not recorded properly because you needed to keep an eye on the experiment at all times to get the most accurate answer. The other mistake was with the measuring cylinders needed to make sure that this experiment used one for sodium thiosulfate and a another for hydrochloric acid otherwise it will be an inaccurate answer because the chemicals will already mix when your measuring how much you will needwith one of the chemicals. To improve this experiment, it would have been better if one person is always watching the tests so this experiment would have made the results more accurate and if the measuring cylinders were easier to tell apart so there was a clear distinction of which on was used for that certain chemical. Conclusion In conclusion, the experiment was used to have a better understanding of chemical reactions depending of the concentration. The collision theory was used to rate the chemical change, hydrochloric acid and sodium thiosulfate make a yellow liquid substance. Concentration is also used every single day without most peoples knowledge. The concentration did effect the reaction rate because it either had a high or low reaction rate. The hypothesis was supported except for the concentration of 2M more information was needed to understand why. Bibliography Chemistry LibreTexts. (2017). Reaction Rate. [online] Available at: https://chem.libretexts.org/Core/Physical_and_Theoretical_Chemistry/Kinetics/Reaction_Rates/Reaction_Rate   [Accessed 9 Feb. 2017]. Encyclopedia Britannica. (2017) | chemistry. [online] Available at:   https://www.britannica.com/science/collision-theory-chemistry   [Accessed 5 Mar. 2017]. Mar. 2017]. Studios, A. (2017). Chem4Kids.com: Reactions: Rates of Reactions. [online] Chem4Kids.com. Available at: http://www.chem4kids.com/files/react_rates.html   [Accessed 5 Mar. 2017]. Pubchem.ncbi.nlm.gov. (2017) | HCI Pubchem. [online] Available at: https://pubchem.ncbi.nlm.nih.gov/compound/hydrochloric_acid [Accessed 9 Feb. 2017]. Pubchem.ncbi.nlm.gov. (2017). SODIUM THIOSULFATE | Na203S2 Pubchem. [online] https://pubchem.ncbi.nlm.nih.gov/compound/Sodium_thiosulphate#section=Top [Accessed 5]

Saturday, January 18, 2020

Different Views in Courtship and Marriage Essay

Outline: Thesis: Compared to my grandparents desired courtship and marriage, my preferred matrimony differs from their expectation in terms of the way to find a spouse, the form of holding a wedding, and the role to play in a family. Topic Sentences: In the first place, when it comes to the ideal way to find a spouse, there is nothing similarly between my grandparents and me. Furthermore, when it makes a mention of the favorite form of holding a wedding, there is almost no alike idea between my grandparents and me. At last, when it points to the appropriate role to play in a family, there are a few standpoints in common between my grandparents and me. Different Views in Courtship and Marriage It is an undeniable fact that traditional culture has influence on courtship and marriage in a country, but the key points of courtship and marriage vary in the different stage of social development. Nowadays, people’s perspective on courtship and marriage has changed with the improvement of life quality in China. Comparing to my grandparents desired courtship and marriage, my preferred matrimony differs from their expectation in terms of the process to find a spouse, the way to hold a wedding, and the role to play in a family. In the first place, when it comes to the ideal way to find a spouse, there is nothing similarly between my grandparents and I. In my grandparents’ opinion, the introduction of matchmaker is the most acceptant way to find a partner, but I prefer to seek mate through myself. It is an undeniable fact that the spouse introduced by a go-between would have more similarities with us in the respect of family background. The importance of family background could be shown in the aspect of building a person’s personality. After all, a good family background is beneficial to build sound personality. Nevertheless, the parties feeling to spouse is usually neglected correspondingly when the matchmaker help applicants to search for a partner among the candidates. It is hard to feel happy for most people in a marriage without love, and then we would lose patience and confidence to this kind of marriage. Seeking the partner by ourselves will  resolve the feeling problem effectively, and the advantage of deciding the spouse obey our mind is also represented in the following sides. For instance, it is easy to forgive each other after an argument because we value the relationship and do not willing to give it up lightly, and it is also not complicated to take care of the other one in the right way due to the fact that we are familiar with his habits. However, the disadvantages of making the decision by our mind should be brought to our attention as well. For example, there are a great many examples stating the fact that the amorous couple often gives too little care to the partner’s weakness. This behavior always leads to the occurrence of Lightning marriage, and lightning marriage often results in a tragic ending due to lack of family commitments. Furthermore, when it makes a mention of the favorite form of holding a wedding, there is almost no alike idea between my grandparents and I. In my grandparents’ eyes, complying with the traditional wedding form is the best way to hold a wedding. But in my view, I really desire to have a wedding of my dreams. In other words, I would be the designer of my wedding form. The benefits of traditional wedding form are all wedding participants understand their work and people could pay more attention to the wedding arrangements. However, most people have a boring and outdated feeling when they talk about the traditional wedding form at present. The drawbacks of the traditional wedding are enlarged in the mind of our generation, because we can easily find that not only it difficult to leave a special impression, but also with som e feudal colors, and feudal colors could not coexist with our values to advocate science. Holding the wedding in the form of my dream will full conform to the standard in my mind, and let me comprehend the meaning of my marriage at a deeper level. Of course, I have to admit that the wedding form in the field of my expectation still has drawbacks. For example, I want a wedding at the beach with a simple way, but a comfortable atmosphere. This wedding form determines the main participants are composed of the most important person in my life instead of the friends of my grandparents or parents. Consequently, it loses the opportunity to become a public ceremony, and my families will feel disregardful and regretful. This hurt would be in the wake of their life, and it has negative influence on the relationship between my families and I. At last, when it points to the appropriate role to play in a family, there are a few standpoints in common between my  grandparents and I. In the perspective of my grandparents, the woman should be a fulltime wife in a family, and the man should be responsible for make money to raise a family. Nevertheless, from my point of view, men and women have equal status in marriage. It means men and women play the same role in a family. The merit of my grandparents’ perspective is evident that children will grow up in the environment which is full of love. Nevertheless, this allocation of roles in a family goes against to women’s individual value. The merit of my point of view is women could achieve her goal by pursuing career achievements. However, the weakness of my point of view is that women have to undergo extra pressure from the society competition and then they are in fear of getting married. All in all, different perspectives and attitudes in terms of courtship and marriage have positive sides as well as negative sides, it would be much better if we consider all of them before making a choice. Your first draft Grade is D- Read the instruction carefully, and rewrite your essay. Submit your final draft by Oct. 5 11:59PM

Friday, January 10, 2020

Movie Review the Return of the Titans

JC Life of Pi: A Movie Review The movie â€Å"Life of Pi† is a story of survival. In order to survive, the protagonist, â€Å"Pi†, draws his inner strength from his spirituality and practicality. A scientist once said, [i]â€Å"A man, as a general rule, owes very little to what he is born with. A man is what he makes himself. † As Pi tried to survive in the ocean, he became a soldier in his own right. What Pi’s character portrayed is very similar to what a good soldier should be. On Military Professionalism At the beginning of the story, the pureness, innocence and compassion of Pi’s heart became the foundation of how his character and values were molded.Just like any soldier, very evident to Pi is his portrayal of the standards of loyalty, competence, ethics and morals. Pi has a high standard of loyalty. Pi expressed in words and in deeds his strong support to his family especially to his father. He knew that his father as the head of the family ha s the authority to lead the family. Even though it is against his will to sail to the Pacific and leave India, he knew who has authority and who demands obedience. There is competence as Pi possesses the knowledge, skills, physical attributes and character traits that are necessary in order to survive.From childhood, his quest for information, logic and eagerness to know how things should be done harnessed his whole being through the years. Pi has ethics. He knew how to observe and conform to the accepted principles of right conduct being part of not just his family, but also his family as part of the whole community. His ethics governed his behavior towards the tiger even in a most undesirable situation of being cast away. He is honest, just, truthful and very much concerned about the things that surround him. What differs Pi, from the tiger named Richard Parker, is his being a rational being.It means Pi has morals because of his discernment from knowing what is right from wrong. H is transparency in his acts and openness with his feelings dictated his morals and his morals defined him as a person. On AFP Core Values/Philosophy/Creed At the end of the story, Pi’s total character is revealed. For one who strived to survive, it was inevitable for him to have lived with the same Core Values of a soldier. These values are the love of country, honor, loyalty, valor, duty, and solidarity. His love of country becomes evident with the way he talked about India.He even argued with his father about leaving India when Christopher Columbus sailed the Pacific to find India. He also talked about the cultures and traditions of India with pride and respect. It is respect in the sense that though some traditions and customs (for him) are questionable, he respects it anyway. His honor is equated with his integrity. Growing up in a family who valued honor, with great reputation and credibility, it became easy for him to aspire to live a decent life. His loyalty was displa yed when he acknowledged who the ‘boss’ is or who should demand his obedience.This loyalty enhanced his dedication to establish communication with the tiger. It was tedious and difficult but Pi never stopped trying. So when he won the cooperation of tiger he then showed his sincere concern for the well being of that ‘Richard Parker’. Taming Richard Parker and surviving alone in the Pacific for 221 days is seemingly impossible, but for Pi, he was able to survive. There is valor because he had the ability to overcome his fears and he endured all kinds of pain and hardship just to accomplish his bold will to survive.But what is more glaring is the spiritual side of valor that is shown by his composure, calmness and presence of mind. Even in times of danger, he tried and fought so hard not to be taken by surprise. Despite the difficult moments and the danger of storms, Pi’s values, obedience and discipline remained intact. He took it as a responsibility to survive, so he can take care of Richard Parker. He rendered service by hunting for food and saving rain water to keep the tiger alive. That willingness to sacrifice for others even if it means giving up his life in the process was not just simply courage, but being true to his duty as well.Lastly, solidarity is not just about being bound together. It is also the sustainment of that bind, considering the presence of the one who leads and the ones being led. In the movie, sometimes the tiger is the leader because he has the control over the situation, and sometimes it is Pi. The leadership that is within defines their solidarity. Thoughts on Correlation There is a saying that, [ii]â€Å"From a pure heart, anything can be accomplished. If you ask what the universe is doing, it is eavesdropping on your every desire†.The difference between a civilian and a citizen is that a citizen has the courage to make the safety of his community a personal responsibility. Pi, is not just an ordinary civilian, he is a citizen. As to the difference between a citizen and a soldier, it is more of a question of understanding how the individual's heart, intent and focus are aligned. If one will look into the verbs used in the roles of Army Core Values, it is â€Å"as protectors of†¦, guardians of†¦, and dynamic proponents for development†¦Ã¢â‚¬ . These contexts are all geared towards doing good for others.May it be a soldier or a warrior, a civilian or a citizen, as individuals, the values, creeds and philosophies are applicable to everyone. In everyday life, it all depends on where a person learns these values from, how he enhances them, when to apply them, why he exercises them and to whom are they for. But these values are always best use for the protection of what he or she finds important and worth protecting. [iii] â€Å"Ethical conduct is not just about uniforms. It is about taking personal responsibility. † ————â⠂¬â€Ã¢â‚¬â€Ã¢â‚¬â€Ã¢â‚¬â€œ [i] Alexander Graham Bell [ii] Deepak Chopra [iii] Anonymous

Thursday, January 2, 2020

The United States Government Surveillance Policy - 1567 Words

Ever since the American public was made aware of the United States government’s surveillance policies, it has been a hotly debated issue across the nation. In 2013, it was revealed that the NSA had, for some time, been collecting data on American citizens, in terms of everything from their Internet history to their phone records. When the story broke, it was a huge talking point, not only across the country, but also throughout the world. The man who introduced Americans to this idea was Edward Snowden. Born June 21, 1983, Edward Snowden was just a 29-year-old contractor for the NSA when he happened across the information (Harding, 2014). Acting on his morals and beliefs, he moved to educate the American public on their government’s activities. His decision to do so impacted the way the nation viewed government surveillance in the years to come. Growing up, Snowden’s principles were deeply influenced by his father. An active member of the U.S. military through his work in the Coast Guard, he was trained to dutifully uphold the Constitution, and instilled this same ideal in his son (Harding, 2014). Snowden had also always been good with computers. Although he lacked a college degree, he eventually got a job with the CIA in the Information Technology department due to his superior skill with a computer (CITE?). This title allowed him maximum security clearance, which later led to him discovering a problem within their system (CITE?). According to Harding, author of TheShow MoreRelatedMonitoring And Collection Of Phone Data1521 Words   |  7 PagesAll around the world, terrorism has become a serious issue and has struck fear into the hearts of many. In the United States, a debate has arisen about the monitoring and collection of phone data. 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