Nobody downloaded yet


Comments (0) Cite this document
c. When is equilibrium reached in the above reaction Equilibrium is reached in the above reaction when the rate of the forward reaction is equal to the rate of the backward reaction. At equilibrium, [CaO(s)] [CO2(g)] / [CaCO3] = k' / k" = K.
e. The overall rate of the forward reaction was calculated by measuring the mass of CaCO3 consumed found 1g/min…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER97.2% of users find it useful
Read TextPreview


Download file to see previous pages At that time, the equilibrium mixture was quickly cooled in an ice bath and analyzed where the amount of A remaining was found to be 0.04 moles.
b. What was the purpose of the ice bath The ice bath is used to lower the temperature of the mixture. Alcohols and esters are volatile substances and higher temperature will volatilize the said substances and might lead to analytical errors.
a. the pressure is increased - According to Le Chatelier, the position of equilibrium will move in such a way as to counteract the change in pressure. That means that the position of equilibrium will move so that the pressure is reduced again. Pressure is caused by gas molecules hitting the sides of their container. The more molecules you have in the container, the higher the pressure will be. The system can reduce the pressure by reacting in such a way as to produce fewer molecules. In this case, there is 1 molecule on the left-hand side of the equation, and 2 on the right. Increasing the pressure on a gas reaction shifts the position of equilibrium towards the side with fewer molecules. In this case towards the reverse reaction.
b. the temperature is increased - According to Le Chatelier, the position of equilibrium will move in such a way as to counteract the change. ...
Alcohols and esters are volatile substances and higher temperature will volatilize the said substances and might lead to analytical errors.
c. Give an expression for the equilibrium constant for the reaction and calculate a numerical value from the data provided.
K = [CH3COOCH3] [H2O] / [CH3COOH] [CH3OH]
= [.04 moles x 80] [.04 moles x 20] / [.04 moles 64] [.04 moles x 36]
= [3.2] [0.8] / [2.56] [1.44]
= 0.6944
d. Why is the volume not given (or not important in this instance) Volume is not given because it will not make any significant difference in the concentration of the substances present.
3. When Nitrogen (1 mole) and Hydrogen (3 moles) react at constant temperature at a pressure of 5 x 10 ^6 Pa, the equilibrium mixture was found to contain 0.6 moles of ammonia.
a. Calculate mole fractions of all species involved at equilibrium.
N2 + 3H2 2 NH3
Mole fraction of N2 = 1- .06 moles = 0.94 / 5.74 = 0.1638
Mole fraction of H2 = 3 (1-.06 moles) = 3.6 / 5.74 = 0.6272
Mole fraction of NH3 = 2 (0.6) = 1.2 / 5.74 = 0.2090
b. Calculate partial pressure of all species involved at equilibrium.
Pressure = 5 x 10^6 Pa
PN2 = 0.94 RT/V
PH2 = 3.6 RT/V
PNH3 = 1.2 RT/V
c. Calculate Kp = [pNH3]^2 / [pN2] [pH2]^3
4. Gaseous phosphorous(V) Chloride dissociates reversibly as shown below :
PCl5 (g) PCl3 (g) + Cl2 (g) H = +ve
Use Le Chatelier's Principle to state and explain the effect on the position of the equilibrium when:
a. the pressure is increased - According to Le Chatelier, the position of equilibrium will move in such a way as to counteract the change in pressure. That means that the position of equilibrium will move so that the pressure is reduced again. Pressure ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
(“ASSIGNMENT IN CHEMISTRY Essay Example | Topics and Well Written Essays - 1000 words”, n.d.)
Retrieved from
(ASSIGNMENT IN CHEMISTRY Essay Example | Topics and Well Written Essays - 1000 Words)
“ASSIGNMENT IN CHEMISTRY Essay Example | Topics and Well Written Essays - 1000 Words”, n.d.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document


Clinical Chemistry Assignment: Case study and data interpretation

...?Case Study and Data Interpretation Question Plasma Osmolality is the amount of electrolyte water balance in the body. Sodium salts, glucose, and urea are the major causes of osmolality (Moritz ML, 2010). Most of the people confuse plasma osmolarity with plasma osmolality. The difference is the amount of measure used to quantify the amount of solutes in plasma. One litre of plasma osmolality is equivalent to 1 kilogram of plasma osmolarity. Osmolality in blood tend to increase with the body loss of water. For a normal person the antidiuretic hormone will be under stimulation if there is increased rate of osmolality. The presence of antidiuretic hormone leads to reabsorption of water. The urine excreted also becomes more... Study and Data...
3 Pages(750 words)Assignment

Chemistry Assignment - Heat, Fire, Bohl model, Hydrogen

...Week1 DQ A fire is started in a fireplace by striking a match and lighting crumpled paper under some logs. Describe all the energy transfers in the scenario. Answer: Match stick is made up of (wood+sulphur) that contain chemical energy Striking the match involves scratching the sulphur end on the rough surface thus producing friction hence kinetic, sound and heat energy are produced at this instance. The match stick lights hence produces light and heat energy that burns the crumpled papers and logs consecutively. Crumpled papers and logs contain chemical energy and while burning produces light and heat energy. Thus: Chemical energy kinetic energy heat energy sound energy light energy heat energy chemical energy... DQ A fire...
2 Pages(500 words)Essay

Chemistry Assignment

...Question a) has 4 protons and 11-4=7 neutrons, because it's neutral it has 4 electrons b) "hydrogen like beryllium ion has electron. Symbol for such ion is: c) i)En=-(13.6eV*z)/n, because z=4 it can be written as En=-16*13.6eV / n ii) the dependence of quatum numbers n upon l is given by the following formula l=n-1 2(2*l+1)=2* n iii) n=2 for beryllium, so l=1 and can not be 3 d) i) E1=-16*13.6eV / 1=-217.6eV E2=-16*13.6eV / 4= -54.4eV E3=-16*13.6eV / 9 = -3.067eV Eoo=-16*13.6eV/inf = 0 ii) iii) energy emitted by photon: |Einf- E2|= 0+54.4eV=54.4 eV= 54.4*1.6*10^-19 [J]=8,7*10^-18 [J] 8,7*10^-18 [J] now we should express photon's frequency from it' energy: E=h*f => f=E/h f= 8,7*10^-18 [J]/6.63... a) has 4...
1 Pages(250 words)Assignment

Chemistry Practical Assignment - Copper carbonate

...Chemistry Practical Assignment Introduction: Copper carbonate if heated will produce gas and by measuring the volume of gas, we can experimentally establish the correctness of both the equations provided to us. The important thing for finding the correct equation is that the volume of one mole of gas at NTP is 22.4 liter and using this equation we can back calculate the mole or mass of carbon dioxide formed from the copper carbonate used for the experiment (Determining the Correct Equation for the Decomposition of Copper Carbonate, 2003) and hence find out the correctness of the eauation provided. Equipment and Apparatus required for conducting the experiment: The following apparatuses are required to conduct the experiment... to get...
4 Pages(1000 words)Lab Report

Chemistry assignment

... containing unreacted NaOH was made up to 250 cm3 in a volumetric flask. 25 cm3 samples of this solution were titrated against 0.1 mol dm-3 hydrochloric acid using bromothymol blue as an indicator. HCl + NaOH  NaCl + H2O The mean titre was 20.0 cm3. Calculate the percentage of ammonium sulphate by mass in the lawn sand. From HCl + NaOH  NaCl + H2O, From (NH4) 2SO4 (s) + 2NaOH (aq)  2NH3 (g) + Na2SO4(aq) + 2H2O (1), Source: Brown, T., Bursten, B., Lemay, E. (2002). Chemistry: The central science. New York: Prentice Hall... FORMULAE & EQUATIONS Write formulae for the following compounds: a) magnesium chloride - d) sodium hydrogen carbonate -b) calcium carbonate - e) ammonium sulphate - c) potassium phosphate - f) barium ni...
7 Pages(1750 words)Essay

Chemistry assignment

...+0.179 = 0.0.429 mol/L Figure 1 Polar and covalent bonds (Source: Lewis) Works Cited Atkins, Peter, and Julio de Paula. ATKINS Physical Chemistry, eighth ed. Oxford: Oxford University Press, 2006. Gilbert, Thomas, Rein Kriss, and Geoffrey Davies. Chemistry: The Science in Context. New York: W. W. Norton & Company, 2003. Lewis, Rob, and Wynne Evans. Chemistry, third ed. Hampshire: Palgrave Macmillan, 1997. "Visual Elements: Patterns in the Periodic Table." Royal Society of Chemistry. 20 July 2009 .... Calculate the value of K at 25oC for the following reaction: 4NH3(g) + 7O2(g)  4NO2(g) + 6H2O(g) R is 0.08206Latm/Kmol and Kp is 9 x 103. Equilibrium constant K is written in terms of partial pressure equilibrium constant Kp as (Lewis): Kp = 1.9×...
3 Pages(750 words)Assignment

Org chemistry drawing assignment

... Your Module Organic Chemistry Drawing Assignment Draw a chair cyclohexane ring and label of the substituents as axial or equatorial. Figure 1: Axial (a) and equatorial (e) positions in cyclohexane 2) Draw trans-1,2-dimethylcyclohexane and cis-1,2-dimethylcyclohexane as their most stable chair conformations. Label all non-favorable interactions, describe why they are unfavorable, and to what value (energy). Which is more stable, the trans or cis structure? Figure 2: cis and trans 1,2-dimethylcyclohexane. All non-favorable 1,3-diaxial interactions are presented in the figure above. Such interactions are unfavorable because both methyl groups and hydrogens try to occupy the same space, which leads to destabilization of the molecule... ...
4 Pages(1000 words)Coursework

Assignment (Chemistry subject)

...Assignment Chapter Molecular Reasons 14- What is the difference between a homogeneous and a mixture and a heterogeneous mixture? Give one example of each Answer: Mixture: This is a mixture of two or more pure substance combined to form a mixture. It can consist of Matter having variable composition with definite or varying properties and can be separated into component elements or compounds. Example include carbonated soda, coarse mixture of sea water or even mixture of air that contain nitrogen, oxygen, carbon dioxide and many others. Homogeneous Mixture: They possess uniform composition and look. They include salt and water, soda, metallic alloys. Heterogeneous Mixture: They do not have uniform composition such as...
2 Pages(500 words)Assignment

Chemistry assignment

... Advanced biochemistry ll Response to question The anaerobiosis needs the NAD+ regeneration from NADH so as to allow the continuation of glycolysis. Part a Figure 1 shows the fate of the glucose carbon atoms. C-1 (or C-6) becomes C-3 of a glyceraldeldehyde 3-phosphate and pyruvate subsequently. If the decarboxylation of the pyruvate occurs and ethanol is reduced, C-3 would be the C-2 of ethanol given by CH3-CH2-OH. Figure 1. O14 CO + Part b For all the conversion of all the labeled atoms of carbon to 14CO2 from glucose during the fermentation of ethanol, the original label has to be placed on C-3 or C-4 of the glucose as these are changed to the pyruvate carboxyl group. Response to question 2. The fermentation of ethanol in yeast...
2 Pages(500 words)Assignment

Analytical chemistry assignment 12 questions

...ANALYTICAL CHEMISTRY ASSIGNMENT due Explain the problems encounter when making chemical measurements, define the terms analyte, matrix and interferent (5 Marks). Some of the problems encountered when making chemical measurements include the complexity of the measuring equipment and the expertise of the personnel. Some procedures may not produce reliable results without complicated measuring equipment while others may require highly trained staff to perform the procedures. An analyte can be defined as the substance or component that is of interest in a chemical analysis procedure. It is the chemical constituent that is being measured. A matrix, on the other hand, can be defined as the chemical components...
5 Pages(1250 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 Essay on topic ASSIGNMENT IN CHEMISTRY for FREE!

Contact Us