Nobody downloaded yet

Enthalpy of Neutralisation - Lab Report Example

Comments (0) Cite this document
Temperature measurements were taken at intervals of 30 seconds and were used to generate graph time against temperature in each case. It was…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER97.6% of users find it useful
Enthalpy of Neutralisation
Read TextPreview

Extract of sample
"Enthalpy of Neutralisation"

Download file to see previous pages As a matter of fact, this variation is attributed to the fact that when a strong acid is used, full ionization takes place while with a weak acid; ionization is incomplete (Jarvis, 2011). In this experiment, NaOH is mixed with HCL and later with CH3COOH.
Place 500 mL of water into the calorimeter and add 150 mL of 1.0 M sodium hydroxide. Measure 160 mL (an excess) of 1.0 M hydrochloric acid into a 400 mL beaker. Start the stopwatch and stir the two solutions with separate stirring rods and measure their temperatures (use separate thermometers) at 30 s intervals as above. (DO NOT stir the solutions with the thermometers.) After 5 min (do not reset timer to zero) rapidly, but quantitatively, pour the HCl into the calorimeter. Replace the stopper. Continue stirring and record the temperature of the reaction mixture at 30 s intervals for the next 5 min.
After the experiment is completed, test the solution with two drops of phenolphthalein. If the reaction mixture is alkaline, insufficient acid has been added and the results are worthless ‐ start again.
The first part of the experiment is about reactions between fully ionized strong acids and strong bases and the sole real chemical change is formation of water molecule from hydrogen ions and hydroxide ions. This is given as follows,
Evidently, the reaction between NaOH and HCL yields a higher enthalpy of neutralization as compared to the reaction between NaOH and CH3COOH. This is attributed to the fact that the enthalpy of neutralization of a NaOH with a HCL involves complete ionization of the dilute aqueous solutions and hence the reaction involves higher energy. In the case of CH3COOH, while NaOH undergoes complete ionization, CH3COOH only partly ionizes and as a result the enthalpy of neutralization is lower.
There are various methods used in measurement of such heat. Initially measurements were premised on simple thermometric ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
(“Enthalpy of Neutralisation Lab Report Example | Topics and Well Written Essays - 500 words”, n.d.)
Enthalpy of Neutralisation Lab Report Example | Topics and Well Written Essays - 500 words. Retrieved from
(Enthalpy of Neutralisation Lab Report Example | Topics and Well Written Essays - 500 Words)
Enthalpy of Neutralisation Lab Report Example | Topics and Well Written Essays - 500 Words.
“Enthalpy of Neutralisation Lab Report Example | Topics and Well Written Essays - 500 Words”, n.d.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document
Fire Engineering Design Project
...of the plume from the spill parameter to the smoke boundary foundation in the reservoir. Zo = Altitude of the virtual line origination beneath the spill parameter (m) ? = density In the application of dimensional research, Poreh deduced a proportion between the mass flow rate for a line plume and the convective enthalpy production of gases. This proportion applied the convection of a volumetric flow of the ambient air into a measurement for a dimension of the plume The extreme field is a proportion of the floating flow per measured length and the space from the virtual origination. This equation was introduced which is not reliant upon density (Harrison 2004 p 35). 1. Mp= CQ?*(z+zo), where 2. C=0.3Cm?W?, z= -d, Mp= Mb so...
6 Pages(1500 words)Assignment
Organic Chemistry Intro. to Radical Halogenation, Thermodynamics, Kinetics, Radical Halogenation Cont., Alkyl halides
...into a main product. A radical of bromine adds a more stable carbon of degree three to alkanes. 5. Using the bond energies posted or in the textbook, calculates the ?H° for the reactions providing each product above. Do these values support your answer in question? What other factors must be taken into account? Initiation Br-Br 2Br ?H°=192 k j/mol From the above reactions, 1) ?H°= ? products- ? reactants = (368+343)- 343 = 368 Kj/mol 2) ?H°= ? products- ? reactants = 272 -(343 + 192) = -263Kj/mol Overall enthalpy = 368- 263 =+105Kj/mol Second product 3. ?H°? products- ? reactants (343+368) – (343) = 368 kj/mol 4. ?H°= ? products- ? reactants = (272) – (343+192) = -263 Kj/mol Overall= 368 – 263= 105 Kj/mol The other...
4 Pages(1000 words)Assignment
Hot and Cold
...doubled from 4707 J to 8368 J, respectively. Therefore, when the energy needed increases the heat evolved also increases with the increase in temperature change. The heat of neutralisation needs not to change since it is the heat produced per mole, however, in the experiment it did not turn out to be same as it changed. This may be due to some errors form the experiment. Conclusion The experiment was successful, and the aim of the experiment was met. It was also noted that concentration of the reactants is directly proportional to the change in temperature and the heat evolved, at constant volume, but it does not affect heat of neutralisation. The success of the experiment was dependable on the accuracy...
5 Pages(1250 words)Lab Report
Chemistry Practice - Bonding energy kinetics
... In SiH4, the four outer electrons of the silicon atom are bonded to the outer electrons of four hydrogen atoms. There are no lone pair of electrons. According to the electron pair replusion theory, the four bonded pairs repel each other as far apart as possible. SiH4 will hence be tetrahedral in shape with a bond angle of 109.5. (c) PCl5 In PCl5, the five outer electrons of the phosphorus atom are bonded to the outer electrons of five chlorine atoms. There are no lone pair of electrons. According to the electron pair replusion theory, the five bonded pairs repel each other as far apart as possible. The shape of PCl5 will be trigonal bipyramid, with bond angles of 120 and 90. 12 marks 4. Enthalpy changes... for the...
4 Pages(1000 words)Lab Report
Chemical equations, enthalpy changes and chemical equilibrium, acid, base and pH, and chemical reactions, chirality, simple organic functional groups and their reactions
... Lecturer “Organic Chemistry” (a)  Compound A, shown in Figure is a biologically important molecule that is produced naturally by many plants and animals. It is also used as a treatment for Parkinson’s disease. This molecule contains a chiral carbon atom. Figure 1 Compound A. 1. Explain what the terms chiral atom and chiral molecule mean. Chiral atom is an atom (mostly carbon) that is bonded to other distinct and different groups (usually four since carbon makes four bonds). It is therefore arguably correct to say it is one atom bonded to four different atoms or groups of atoms. Chiral molecule is one that has a non-identical stereo-center and therefore non-super imposable on its mirror image. It is however not necessarily... Lecturer...
3 Pages(750 words)Assignment
Thermochemistry Hess' law
... Marilu Contreras & Ruben Carbajal Johnson Chemistry 120 26March In this experiment, the main purpose was to measure the quantity of heat involved in three reactions and then compare the results. Measuring and comparing these three reactions will help verifying Hess’s Law which states that the enthalpy change for any reaction is independent of the pathway. Reaction one involved dissolving of sodium hydroxide in water; Reaction 2 involved reaction between sodium hydroxide and dilute hydrochloric acid; reaction 3 involved reaction between sodium hydroxide and hydrochloric acid solution. The use of Styrofoam calorimeter will help in measuring the heat of reactions for the three. Introduction Thermochemistry, which is a branch... of...
5 Pages(1250 words)Lab Report
Catalysis and catalysts
...they work by using the enthalpy reaction profiles, and demonstrate the difference between the heterogeneous and homogenous catalysts and showing examples (Bruice, 2007). A reaction can be sped up by a catalyst since they offer an optional route for the reactions to happen. They lessen the necessary reaction energy for the reactants to create products, therefore, atoms; at any given time will have the necessary energy for activation in order for the products to form. This principle is based on the collision particle theory (Gates, 1992) Maxwell Boltzman distribution diagram Reactant molecules interaction with catalysts to provide other routes for the response that connects a lower activation as compared to that of the...
3 Pages(750 words)Essay
Measuring The Heat of Decomposition of Hydrogen Peroxide
...Decomposition of hydrogen peroxide 28/10 Introduction H2O2 decomposes through a redox reaction to form water and oxygen: 2H2O (aq) ------------------> 2H2O(l) + O2(g) This reaction is very slow since H­2O2 is a very stable compound. It can remain stable for several years. To speed up the reaction a catalyst is used. Examples of catalysts that can be used are potassium iodide, catalase (Williams) and iron (III) nitrate. The redox reaction of H­2O2 is an exothermic kind. By measuring how the temperature changes when H­2O2 and a catalyst are mixed, it is possible to determine the enthalpy of decomposition H­2O2. This experiment will determine the enthalpy of decomposition of H­2O2 ­when it is mixed with potassium iodide... ...
5 Pages(1250 words)Lab Report
Kinetic of the catalytic decomposition of hydrogen peroxide
...the effect on the rate of decomposition of the hydrogen peroxide and work out the reaction sequence with Iron (III) chloride. Calculate the activation enthalpy of the decomposition of hydrogen peroxide solution when (manganese (IV) oxide & Iron (III) chloride) act as a catalyst and compare their effectiveness. A standard procedure for working out the enthalpy should be applicable for both case studies. Find the order of each reactant and use the order to explain the mechanism of the same. It should involve comparison of the rate of reaction of hydrogen peroxide with manganese (IV) oxide and Iron (III) chloride. Such a comparison would be easy under standard conditions. Graphical representations of...
5 Pages(1250 words)Coursework
Water Chemistry
...- this is a measure of how much a system is disordered. Denoted by S. (b) Enthalpy- this is the product of pressure of a system and volume of a system added to the internal energy of a system. (c) Gibbs Free Energy- this is the product of entropy and absolute temperature subtracted from the enthalpy of a system. (d) Exothermic reaction- this is a chemical reaction in which energy is released in the form of either light or heat. Endothermic reaction- this is a chemical reaction where energy is absorbed from the surrounding. The energy can be in form of heat but not in all cases. #3 Solutions (a) Calculate the enthalpy reaction for Reactions are: Simplifying the three equations: (b) Calculate the Gibbs free energy... Chemistry ...
1 Pages(250 words)Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Let us find you another Lab Report on topic Enthalpy of Neutralisation for FREE!
logo footer
Contact us:
Contact Us Now
FREE Mobile Apps:
  • StudentShare App Store
  • StudentShare Google play
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • Miscellaneous
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us