Neutralisation Reaction
Apparatus: The apparatus that I will be using in this experiment will
be:
* A Burette
* A Clamp and Stand
* 2x 50ml Beakers
* A Conical Flask
* A Measuring Cylinder
* A Thermometer
* Universal Indicator
* 25ml Hydrochloric Acid
* 25ml Sodium Hydroxide
Method/Plan of the experiment:
First of all, I will set up the apparatus as the diagram shows:
Then, I will measure out the acid and alkali using the measuring
cylinder. Once I have done that, I will pour the 25ml of Hydrochloric
Acid in to the conical flask. I will also pour the 25ml of Sodium
Hydroxide into the burette, and adding 1cm cubed of alkali at a time
into the conical flask, I will record the temperature of the solution
made by the two substances. By now, I will have also put the Universal
Indicator into the conical flask, and I will stop the experiment when
the solution is neutral, which should be when the alkali in the
burette runs out.
Predictions:
I think that as the two solutions are added together, they will cause
the temperature of their solution to rise as the neutralisation takes
place. This is because when energy in the form of heat is given out of
a reaction it is an exothermic reaction. Exothermic reactions usually
need activation energy, the energy to break the bonds in the chemicals
and to start the reaction. Once the bonds are broken new stronger
bonds are formed. In an exothermic reaction energy in the form of heat
is given out to the surrounding when the products are formed.
Therefore there is an average rise in temperature. These stronger,
bigger bonds are hot, and therefore cause the temperature of the
solution to rise.
Observations/Results:
Volume of Sodium Hydroxide added*
Temperature of Solution**
Volume of Sodium Hydroxide added*
The experiment of Diels-Alder reactions, in particular the furan and maleic anhydride as used in my experiment, observed the exo product as oppose to the exo product. This shows the tendency for the stereochemistry of the Diels-Alder to yield an exo product in preference to the endo product. To determine the stereochemistry, a melt temperature of the product was taken and compared to literature values. The melt temperature for the product was roughly around 113oC, corresponding to the exo Diels-Alder product of furan and maleic anhydride. When compared to the class data of melting ranges, the melting temperature from the reaction was relatively consistent to the majority. Based off this, the assumption can be made that the Diels-Alder prefers
2-ethyl-1,3-hexanediol. The molecular weight of this compound is 146.2g/mol. It is converted into 2-ethyl-1-hydroxyhexan-3-one. This compounds molecular weight is 144.2g/mol. This gives a theoretical yield of .63 grams. My actual yield was .42 grams. Therefore, my percent yield was 67%. This was one of my highest yields yet. I felt that this was a good yield because part of this experiment is an equilibrium reaction. Hypochlorite must be used in excess to push the reaction to the right. Also, there were better ways to do this experiment where higher yields could have been produced. For example PCC could have been used. However, because of its toxic properties, its use is restricted. The purpose of this experiment was to determine which of the 3 compounds was formed from the starting material. The third compound was the oxidation of both alcohols. This could not have been my product because of the results of my IR. I had a broad large absorption is the range of 3200 to 3500 wavenumbers. This indicates the presence of an alcohol. If my compound had been fully oxidized then there would be no such alcohol present. Also, because of my IR, I know that my compound was one of the other 2 compounds because of the strong sharp absorption at 1705 wavenumbers. This indicates the presence of a carbonyl. Also, my 2,4-DNP test was positive. Therefore I had to prove which of the two compounds my final product was. The first was the oxidation of the primary alcohol, forming an aldehyde and a secondary alcohol. This could not have been my product because the Tollen’s test. My test was negative indicating no such aldehyde. Also, the textbook states that aldehydes show 2 characteristic absorption’s in the range of 2720-2820 wavenumbers. No such absorption’s were present in my sample. Therefore my final product was the oxidation of the secondary alcohol. My final product had a primary alcohol and a secondary ketone
* No energy is lost e.g. sound and heat which would be a result of
Purpose/Introduction: In this experiment, four elimination reactions were compared and contrasted under acidic (H2SO4) and basic (KOC(CO3)3) conditions. Acid-catalyzed dehydration was done on 2-butanol and 1-butanol; a 2o and 1o alcohol, respectively. The base-induced dehydrobromination was performed on 2-bromobutane and 1-bromobutane isomeric halides. The stereochemistry and regiochemistry of the four reactions were analyzed by gas chromatography (GC) to determine product distribution (assuming that the amount of each product in the gas mixture is proportional to the area under its complementary GC peak).
type of energy is lost or gained, and whether or not a factor that is
NaOH(aq)Â Â Â Â Â Â Â Â +Â Â Â Â Â Â Â Â Â HCl(aq)Â Â Â Â Â Â Â Â Â Â Â Â Â Ã Â Â Â Â Â Â Â Â Â Â Â Â NaCl(aq) Â Â Â Â Â Â + Â Â Â H2O(l).
The first law of thermodynamics simply states that heat is a form of energy and heat energy cannot be created nor destroyed. In this lab we were measuring the change in temperature and how it affected the enthalpy of the reaction.
Theories have often been developed to explain how delinquents violate social norms and still manage to maintain positive self images of themselves. Neutralization theory, developed by Gresham Sykes and David Matza in 1957 set out to do just this. Critics, however, have claims that the theory, on it’s own, is not a sufficient explanation for adolescent’s participation in crime in delinquency. It has also been claimed by critics that neutralization theory is best viewed as a components of larger theory of crime and can be incorporated into other theories such as social bond theory.
place. This is where we come to grips with our lives, relax, and reflect. This
Furthermore, I believe that the neutralization theory has a strong presence in Sherlock. The neutralization theory was discovered by Gresham Sykes and David Matza, who suggested that most criminals still believe in societal values and realize that their actions are wrong. In response, they attempt to neutralize their actions with defenses. One defense, or technique, is the denial of responsibility (Tibbetts, 2015). In “The Final Problem,” when John Watson helps make the decision of who Eurus should kill, he says, “There’s a plane in the air that’s gonna crash.
which is actually hot, like fire, makes something which is potentially hot, like wood, to
Radiation is when the heat energy travels in actual waves. The suns energy gets to earth because of radiation. These three types of heat transfer can be easily found in the activities we have been doing the past couple of weeks having to do with a universal dwelling. They can mostly be seen when we are trying to test the heating and cooling capabilities of our universal home model.
Finding Out Which Fuel Releases the Most Energy Per Gram. Aim: To be able to Find out which fuel releases the most energy per gram. Scientific Theory: What is the Science of Heat is the transfer of energy between two objects due to a temperature. The sand is a sand.
Thermodynamics is the branch of science concerned with the nature of heat and its conversion to any form of energy. In thermodynamics, both the thermodynamic system and its environment are considered. A thermodynamic system, in general, is defined by its volume, pressure, temperature, and chemical make-up. In general, the environment will contain heat sources with unlimited heat capacity, allowing it to give and receive heat without changing its temperature. Whenever the conditions change, the thermodynamic system will respond by changing its state; the temperature, volume, pressure, or chemical make-up will adjust accordingly in order to reach its original state of equilibrium.
Heat energy is transferred through three ways- conduction, convection and radiation. All three are able to transfer heat from one place to another based off of different principles however, are all three are connected by the physics of heat. Let’s start with heat- what exactly is heat? We can understand heat by knowing that “heat is a thermal energy that flows from the warmer areas to the cooler areas, and the thermal energy is the total of all kinetic energies within a given system.” (Soffar, 2015) Now, we can explore the means to which heat is transferred and how each of them occurs. Heat is transferred through conduction at the molecular level and in simple terms, the transfers occurs through physical contact. In conduction, “the substance