The Activation Energy of Bromide ion and Bromate ion
To Determine the Activation Energy of the Reaction between Bromide
ion and Bromate (V) ion in Acid Solution
Objectives:
By reacting Potassium Bromide and Potassium Bromate in the acid
solution in varies temperature, we can then determine the Activation
Energy of the reaction in different temperature through the equation:[IMAGE].
Questions:
1. Give an equation for the reaction between phenol and bromine.
2. What is the use of methyl orange in this experiment?
The methyl orange is used as an indicator for the reaction. Bromine
will be produces during the reaction and it will react with phenol
rapidly. Once all the phenol is used up, further bromine produced will
bleach the methyl orange immediately. So the rate of the reaction can
be calculated from the time for the indicator to be decolorized.
3. Based on your results, is it advisable to perform the experiment at
high temperatures such as 80℃?
From the above results, the time of the reaction is shorter as the
experiment temperature increase. So it is not advisable to perform the
experiment at high temperatures as the time of reaction is too short,
it is not easy for us to record.
4. Why is it not necessary to know how far the reaction has proceeded
at the point where the methyl red is decolourized?
In the experiment, the number of mole and the molarity of each
chemicals used are the same. And the appearance of the pink colour
only determines that there are some content of the reaction has
processed. As the result, it is only necessary for us to compare the
time required for the reaction mixture to reach the point the
decolourization occurs at different temperature.
5. The Arrhenius equation can be represented as:
(a) Can substitute k in this equation? Why?
Can substitute k in this equation. As in the above experiment,
the initial rate can be represented by due to the constant
concentration of the reactants. Also the rate constant k is
proportional to the rate of the reaction when the temperature changes.
The Difference in Energy Release of Various Alcohols In this experiment, I plan to find out the difference in energy release between different sorts of alcohols. To do this I will test how much alcohol is required to increase the temperature of 100ml of water by 30 degrees Celsius. Obviously, many factors may affect my results, therefore making them less reliable. To improve my results, I will carry out some preliminary research to see if I can improve the reliability and accuracy. Please see attached preliminary work for details (sheet 2a).
This unsettling, but inspirational story of child abuse is full of the many conflicts Pelzer had to endure with his mother. Of all five Pelzer children, only Dave received the abuse from his mother. One of his daily struggles was getting food, which serves as a metaphor for power. Pelzer’s mother controlled him by starving him because she knows he will do anything she asks of him for even the smallest scraps of food. Not only was he starved and beat around, but Pelzer was also told to sit in freezing cold water for hours at a time, forced to eat his own vomit, sleep in the basement on an army cot under the stairs, brutally stabbed, and forced to lay on a burning stove. Second to worst of all, the worst being starved, he would be locked in the bathroom with the concoction of Clorox and ammonia and given a time limit to clean the bathroom with the fumes in the air
... War activists. As a result, this new type of music was seen as a way to establish a sense of identity and pride in oneself by the current generation. Rock ‘n’ roll concert events were a perfect way to get those activists together to simultaneously protest what it was they believed in, be it anti-technology, sexual stereotypes, communal living or pro-drug use or just simply desiring peace. Musicians rose to further fame by voicing the ideas of its listeners across a broad platform and drugs created a type of music that could enhance the timelessness of their drug experience in a supposedly new state of consciousness. Rock ‘n’ roll had gained popularity before the hippie movement began but the characteristics of the movement certainly helped to provide a gateway for new musicians to gain popularity and for those same musicians to exhibit further musical exploration.
Rock and roll, one of the biggest and most influential parts of music history that came out of the 1950s and continued to change the United States in many ways through the mid to late 1960’s rock and roll had changed American youth drastically, inventing not only new sounds but a new culture. That culture would be known as the youth counterculture which changed the way everything would be perceived for the rest of time. It gave birth to a new, modern thinking, and morally concerned youth. Which is why I firmly do believe that the music of the 1960s wasn't just for entertainment, but for people to get their point across, to let the government and society know that things
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Child abuse is the malicious maltreatment of a child by his or her parent, guardian, or any other adult who is responsible for said child. There are different forms of child abuse: physical abuse, sexual abuse, psychological abuse, and neglect (Barnett 2005). In the book, “A Child Called It”, demonstrates different forms of abuse. It illustrates the life of Dave Pelzer, a young boy who was physically and psychologically abused and neglected by his mother. During the time of his adolescent years, his case was listed as one of the most severe recorded child abuse cases in the entire state of California.
pressed samples were annealed for 1 h at the temperatures of 800 ◦C, 900 ◦C, 1150 ◦C under air. The crystalline phase formation of barium hexaferrite, magnetite and composites powder was further investigated with X-ray diffraction (XRD) spectra using an X-Pert PANalytical diffractometer (PW3050/60) using CuKα radiation in the range 20° to 80°, the magnetization vs magnetic field (M-H) plot of barium hexaferrite was obtained using a vibrating sample magnetometer (VSM) and the average particle size was obtained from the scanning transmission electron microscope (STEM). The Room temperature
Having that exhilarating dream, or terrifying one makes me wonder about dreams. The wonder of dreams grows by the day. I continually ask myself why do I dream; what causes me to dream? Where do our dreams originate and occur? Do my dreams have meaning? The answers to these questions are a little complex. The answers I have to give are very sophisticated and need to be thoroughly thought out.
In “The Tragedy of Romeo and Juliet,” William Shakespeare has given the characters realistic aspects. People can relate to Romeo's immature and rash nature, can admire Juliet's growth to maturity, and can find that their teen love is very convincing. To start off, Romeo is very rash and immature, especially when it comes to love. When talking about their relationship, Juliet even said, “It is too rash, too unadvised, too sudden.” Furthermore, Romeo was obsessed with Rosaline but soon became infatuated with Juliet. Friar Lawrence have said, “Young men's love then lies not truly in his heart, but in their eyes.” This aspect of Romeo is realistic because it is a flaw people can relate to. In addition, when pertaining to love, people can relate to Juliet's growth from being a naïve, dependent girl to a matured adult. When Lady Capulet asked Juliet what she thought of marriage, Juliet said, “It is an honor that I dream not of.” But after she fell in love with Romeo, she became more mature when it came to love. Juliet was the one who proposed the marriage to Romeo, saying “If that thy bent...
bonds apart as we go down the list as there will be more bonds to
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