X 1000 Concentration (moldm-3) = (0.025/4) x 1000 = 6.25 cm3 Distilled water required: 250 cm3 – 6.25 cm3 = 243.75 cm3 Water added to acid can cause an extremely violent reaction so the acid must always be added to the water. For this reason a ten-fold dilution will need to take place from 40 mol dm3. n = c x v = 10 X 0.25 = 2.5 mol v = (n/c) x 1000 =
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The kinetics of the Harcourt-Essen Reaction (Hydrogen peroxide variation) Aims: To find the order of the reaction with respect to the Hydrogen Peroxide (H2O2)‚ Potassium Iodide (KI) and the Sulphuric Acid (H2SO4) by the use of an Iodine clock reaction. Calculate the rate constant‚ mechanism and equation Find the effects of temperature on the rate of reaction The effects of a catalyst on the rate of reaction Find the activation enthalpy (Ea) of the reaction‚ with and without a catalyst Background:
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A2 Chemistry Coursework Section 1 Aims: I aim to find out the order of reaction with respect to [H2O2] and [2I-]. I aim to find out the activation enthalpy of the reaction by finding the rate of reaction at different temperatures using the Arrhenius Equation. The experiment will go as follows: Into a conical flask put 15cm3 of distilled water and add 2cm3 of [X]moldm-3 potassium iodide (KI) solution and 1cm3 of 2moldm-3 sulphuric acid. Then add to this 2.5cm3 of 5vol (0.42moldm-3) hydrogen
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the concentration of H2O2 has on the reaction‚ and to determine the respective order of reaction. To investigate the effect of varying the concentration of KI has on the reaction‚ and to determine the respective order of reaction. To investigate the effect of varying the temperature has on the reaction‚ and to determine the respective order of reaction. To investigate the effect of introducing Ammonium Molybdate to the reaction Arrhenius stuff The reaction of Hydrogen Peroxide and Iodide ions
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Essen‚ City of Industrial History and Artistic Present Essen‚ located on the Ruhr River‚ is one of Germany’s ten biggest cities. Governed by abbesses for more than 1000 years‚ Essen is a center for arts‚ history of coal and steel manufacturing‚ and even a major tourist attraction today. The history of Essen starts in the 800’s; in 852 Aflrid von Hildesheim created a convent. This convent was created for daughters of the Saxon high nobility. The majority of the settlers to come by this convent
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of this case will be presented in court. Mr. Jimmy Harcourt is a Native American who is of Cherokee ancestry. Mr. Jimmy Harcourt is serving a life sentence in a state prison. Mr. Harcourt rank is a medium-security prisoner. Mr. Jimmy Harcourt is starting to have a major health issue. He is losing feeling in his feet due to neuropathy resulting from diabetes. The prison guards started to notice that around the beginning of 2015 Mr. Jimmy Harcourt started performing his Cherokee religious practice
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Developing a successful business model without strong control mechanisms will only generate temporary profits. The purpose of control mechanisms in business models is to protect the created values and profit streams from being reduced by competitors‚ partners or strong customers. The last decades have shown a rapid growth in customer power at the same time as new technology and services are being replaced faster. Even though control always has been an important part of the business model
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DEFENSE MECHANISMS IN PSYCHIATRIC DISORDERS I. PSYCHOSES: *In the acute stage there is a complete loss of the ego’s defense mechanisms‚ and disturbing thoughts‚ feelings‚ and impulses intrude into the consciousness *as the individual gradually improves defenses appear • projection • delusional denial • distortion • regression II. NEUROTIC CONDITIONS: (Anxiety Disorders; Somatoform Disorders; Dissociative Disorders in DSM IV R) *defenses are used non-adaptively in
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Defense Mechanism Defense Mechanism is an unconscious psychological strategies brought into play by various entities to cope with reality and to maintain self-image. Healthy persons normally use different defenses throughout life. An ego defense mechanism becomes pathological only when its persistent use leads to maladaptive behavior such that the physical and/or mental health of the individual is adversely affected. The purpose of ego defense mechanisms is to protect the mind/self/ego from anxiety
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the product solution. 17.1% was the 2-methylcyclohexene products. IV. Questions: 1) What were the isomers of the methylcyclohexene produced from the reaction and what are their relative distribution? 2) Draw a detailed arrow mechanism illustrating how each of the anticipated products could be formed. Use your mechanisms to explain the product distribution represented by your GC analysis. Most Favored Product This product has the most substituted double bond and therefore the
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