Chemistry Essay Examples
Introduction: In this experiment, we utilized the ability for the iodide ion to become oxidized by the persulphate ion. Our general reaction can be described as: (NH4)2S2O8 + 2KI A I2 + (NH4)2SO4 + K2SO4 (1a) However, we know that in an aqueous solution, all of these compounds except iodine will dissociate into their ionic…
Experiment. EDTA Titration of Ca2+ in an unknown solution Experiment. EDTA Titration of Ca2+ in an unknown water sample Modified 9/2012 Objective: The most common multivalent metal ions in natural waters are Ca2+ and Mg2+. In this experiment, you will find the total concentration of calcium ions that can react with EDTA with the assumptions…
Enzymes are proteins which serve to reduce the activation energy required for biological reactions (Russell and others 2010). This allows biologically important chemical reactions to occur rapidly enough to allow cells to carry out their life processes (Russell and others 2010). Enzymes are made of one or more polypeptide strands, which individually or as an…
To determination the partition coefficient of ethanoic acid between water and butan-2-ol. Procedure 1. The room temperature was recorded. 2. 15cm3 of the given aqueous ethanoic acid and 15cm3 of butan-2-ol were poured into a 100cm3 separating funnel, using suitable apparatus. The funnel was stoppered and was shook vigorously for 1 to 2 minutes. (The…
Theory and mechanism Epoxidation is a reaction of an alkene with a peroxycarboxylic acid (also called peracid) to produce an epoxide product, generally performed in inert solvents, such as dichloromethane. The epoxide product is a cyclic ether in which the ring contains three atoms. The alkene gains an oxygen from the peracid in a syn…
The aim of the experiment is to test an unknown substance with a variety of experimental methods, by doing this the identity of the substance will be known. The two types of different testing methods will be anions and cations. Cations are positively charged ions; this is because the atom looses an electron during a…
By completing and testing this hypothesis our group believes that it will factor in the aim of increasing the voltage and current of our Daniell Cell. Hypothesis 2 According to the Standard Reduction Potentials for Half-Reactions table, our group hypothesises that by changing the half cells so that their E0 values are a greater distance…
Furagin: Forced Degradation Surveies Index Index of Figures Index of Tables Abstraction Keywords Abbreviations 1.Introduction 1.1.Forced debasement surveies 1.1.1. Overview of regulative counsel 1.1.2. Review of bing literature and different attacks 1.2.Furagin 1.2.1. Chemical and Physical Information 1.2.2. Pharmaceutical Information 1.2.3. Impurities 2.Aim of the Study 3.Method 3.1.Equipment and stuffs 3.1.1 Method AHPLC/AUPLC 3.1.2 Method…
To find the molarity of the unknown acid, first we had to create a standard solution, the solution we created was Sodium Hydroxide (NaOH). We wanted a 0. 1 molar solution of sodium hydroxide so to get this we had to dissolve 4g of NaOH into 1000cm? of water, but we didn’t want 1000cm? we…
An Investigation to See What Effects the Neutralisation of Acids by Antacids In this experiment I will be looking at what affects the rate of reaction in a chemical reaction between Hydrochloric acid and commercial antacids. I will be looking at one of the Rates of reaction, surface area, to see if a smaller surface…
To investigate and compare the relationships between the amounts of energy released from different alcohols in the alcohol series. BACKGROUND INFORMATION Alcohols are a series of organic homologous compounds with the general formula of C(n) H(2n+1) OH. They gain their properties, which are different to those of other compounds in the homologous series due to…
Chromatography is a method of separating compounds and mixtures so that they can be identified and analyzed. The word chromatography means color writing. There are many kinds of chromatography such as the thin layer chromatography, Partition chromatography, Column chromatography, and Paper chromatography. Chromatography is important in the analysis of processes and materials such as environmental…
Megan Entwistle, Maria Amos, and Paul Golubic CHEM 0330 Organic Lab 1 Sodium Borohydride Reduction: Diphenylmethanol from Benzophenone 11/16/11 Introduction Redox (shorthand for REDuction-OXidation) reactions are chemical reactions in which the oxidation state (or oxidation number) of atoms has changed. Oxidation can be observed through the loss of electrons or an increase in oxidation state…
In this experiment, we are going to use a calorimeter (a solid metal block of aluminium). And we are going to expose it to different temperatures and measure the difference in temperature over time. We will also measure the changes in electric properties from the heater over time: Volts and Amperes. In order to get more…
Isolation and Analysis of Essential Oils using Gas Chromatography Lyndon Justin T. Guzman Institute of Chemistry, University of the Philippines, Diliman, Quezon City Date Performed: February 2; February 4, 2011 Date Submitted: February 18, 2011 Abstract The purpose of this experiment is to isolate the essential oil from eucalyptus leaves as a pure compound; moreover,…
In this lab, our task is to determine how different degrees of temperature affect reaction rates. A Swedish chemist, named Svante Arrhenius discovered the relationship between temperature and reaction rate. In finding this relationship a new equation was formed called the Arrhenius Equation: Reaction rate constant k = A e -Ea/RT The factor A represents the frequency of…
Insert the tube into the MSB and take a mental average of the fluctuating reading. 5. Repeat the previous step three times. 6. If the MSB displays a negative number, the coordination complex is diamagnetic and no further steps are necessary. 7. Determine how many unpaired electrons reside on the cobalt. E. Interpreting Infrared…
Abstract: In this experiment three Werner complexes, hexaamminecobalt(III) chloride, pentaamminechlorocobalt(III) chloride and hexaamminenickel(II) chloride were synthesized so their structural formula could be examined through magnetic susceptibility, electronic conductance measurements and the analysis of free chloride in the two cobalt complexes through titrations of silver nitrate. Cobalt (III) coordination compounds usually only form in low spin,…
Title: Flame Test Aim: To determine the cation in each of the unknown substance X, Y and Z by observing the flame colour of different metal compounds. Introduction: A distinctive feature of many s-block metals is their ability to produce flame colours. At temperature of a Bunsen flame, a compound will decompose to give gaseous…
In today’s society, many products are designed to undergo many chemical reactions before the desired product(s) is created. This principle, also known as chemical synthesis, is an integral part in the operation of products such as an automobile airbag. Beginning with the releasing of nitrogen gas to inflate the bag and ending with the production…
The capillary rise method was used to measure the surface tension of aqueous solutions of sodium chloride and acetic acid. Molar concentrations of 0. 5 M and 1. 0 M for each solution were tested. The results were then compared to the surface tension of pure water to observe how solute properties affect the surface…
Trimyristin is one member of a class of triglycerides which is found in animals’ fatty tissues and vegetable or marine oils. It can dissolve in organic compound such as hot acetone readily as it is a non-polar compound. After the isolation of tirmyristin from nutmeg seed by solvent extraction followed by recrystallizaiton, the present of functional…
Chapter 1 Chemistry 1201/1202 Give the chemical symbol or name for the following elements, as appropriate: (a) sulfur, (b) magnesium, (c) potassium, (d) chlorine, (e) copper, (f) F, (g) Ni, (h) Na, (i) Al, (j)Si Question 1.13 Make the following conversions: (a) 62 degree Farenheit to Celsius, (b) 216.7 degree Celsius (c) 233 degrees Celsius…
It is also used in the laboratories in obtaining design, interpretation of rate of reaction and numerical treatment of kinetics experimental data for different types of reacting systems. The use of a batch reactor for the most part eliminates the effects due to fluid flow on the resulting reaction rates. Consequently, the data reflect the…
What Factors Affect Chemical Equilibrium? Introduction: In investigation 14, ‘What Factors Affect Chemical Equilibrium? “, the purpose was to find out which reagents caused a change in the chemical equilibrium. A deep red color was formed when Iron Nitrate (aqua)l was mixed with water and Ammonium Technocratic [NCSC (aqua)]. The product of these two reactants…
We then poured the water back into the test tube and placed the tube into the bucket with the opening upwards, turning the open end downwards after the tube was fully submerged beneath he surface. We then placed the canister directly below the opening of the test tube, and released the gas so that the…
Chemical compounds are formed by the joining of two or more atoms. A stable compound occurs when the total energy of the combination has lower energy than the separated atoms. The bound state implies a net attractive force between the atoms … a chemical bond. The two extreme cases of chemical bonds are: Covalent bond:…
The two possible balanced reactions are – Cuscus (aqua) + Fee(s) Cue(s) + Feces (aqua) [I] cuscus (aqua) + fee(s) ICC(s) + [II] Through the possible reactions, one of the best way to determine which one is the correct reaction pertaining to the lab is limiting reagent analysis, where mass of copper is quantitatively determined…
One might think that chemists are a bunch of boring scientists who wear lab coats and look at beakers all day, but did you know that many toys you play with are made using chemistry?Some of your favorite toys like Gak, Slime and Silly Putty started out as chemistry experiments. In fact, some of your…
If such ideal conditions are not possible as is usually the case”then simple distillation can be applied as long as he liquid in question is composed of compounds that differ in volatility such that their boiling points differ by at least 40 to 50 degrees Celsius. Because the very essence of simple distillation is relies…
