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Chemistry Essay Examples

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Magnesium Oxide Chemistry Report

In chemistry, compounds can be distinguished by using the empirical formula. The formula provides the simplest positive integer ratio of elements in a compound. The empirical formula is largely useful in determining the ratio of elements within ionic compounds where the structure is of a non-directional nature of bonding where any ion at any time…

Cell Transport Mechanisms and Permeability

Purpose The purpose of this lab is to teach me simulating dialysis, simulating facilitated diffusion, simulating osmotic pressure, simulating filtration, and simulating active transport. Hypothesis If I increase the concentration of sodium chloride from 9mM to 18mM in the left beaker, then the rate of diffusion will increase, because concentration is a variable that affects…

Complexometric Determination of Water Hardness

The water hardness for unknown water sample number 40 was determined. From the results of the two complexometric titrations, the water hardness of the unknown sample was calculated to be 250.9 ppm CaCO3, which agrees with the ranges of acceptable water hardness in the city of Phoenix and Tempe Arizona. Introduction When rainfall picks up…

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Beer’s Law Lab Report

Abstract: The Beer’s law lab was conducted to determine the optimal wavelength of Co(NO3)2·6H2O with the use of spectrometry. The results determined that the optimal wavelength to study the absorbance of this salt was 500nm. It also demonstrated how transmittance of light and absorbance of light are inversely proportional because absorbance is calculated by multiplying…

Analysis Of Hydrocarbon

Abstract In the analysis the solid-phase microextraction (SPME) and capillary gas chromatography/mass spectrometry (GC/MS) was developed for the identification of volatile compounds (hydrocarbon) in fuel. The samples was used is (kerosene, diesel, thinner and petrol) and one unknown. After the analyte was extracted by SPME in 20min, it directly injected to the GCMS with desorption…

Thermodynamics Lab Manual

TABLE OF CONTENT General Instructions Experiment 1 Experiment 2 Experiment 3 Experiment 4 Experiment 5 Experiment 6 Isentropic Expansion Process Brief Depressurization The Fundamental Pressure-Temperature Relationship of Saturated Steam in Equilibrium Determination of Ratio of Volume Determination of Ratio of Heat Capacity Demonstration of Vapour Compression Refrigeration Cycle APPENDIX A Perfect Gas Expansion Unit B…

An Introduction to Qualitative Analysis

Procedure Part I – Qualitative Analysis of Group 2 Elements Mix 0.02M K2CrO4 with each Mg(NO3)2, Ca(NO3)2, Sr(NO3)2 and Ba(NO3)2 together. Secondly, mix 0.1M (NH4)2C2O4 instead of 0.02M K2CrO4 together with the same reactants used before. Thirdly, mix 0.1M Na2SO4 with those reactants. Then, mix 0.1M NaOH with the same reactants used before again. Some…

Complexometric Determination of Water Hardness

Abstract The water hardness for unknown water sample number 40 was determined. From the results of the two complexometric titrations, the water hardness of the unknown sample was calculated to be 250.9 ppm CaCO3, which agrees with the ranges of acceptable water hardness in the city of Phoenix and Tempe Arizona. Introduction When rainfall picks…

Why Should We Study Chemistry

Why should we study Chemistry? Well I’ll tell you why I think I would study Chemistry, why it’s so important and crucial to know and understand. A couple reasons why are that I want to become a doctor in the future, I can see Chemistry in life, and I want to make a difference in…

Texas Instruments

After thoroughly analyzing the information available on TI, I have identified three critical issues that need immediate attention. These include the capacity crunch in meeting forecasts, expectation to reduce the cost per watch, and a lack of efficiency of the workers. In order to tackle these issues, I recommend reducing the cycle time, increasing capacity…

Alchemy vs Chemistry

Some people think that chemistry is just about mixing things up and experimenting in test tubes and explosions. Actually chemistry studies everything around us and how they change, for example it tells what your body is made out of. We study chemistry in biology, geology, engineering, and even physics. Chemistry is the science of matter,…

Chemistry Form 4

INTRODUCTION All the objects that exist around us are made up of chemical substances. These objects exist an element, compound or mixture. All these objects contribute benefit to human kind. As time goes on, human has done many researches to ensure all these chemical substances will be enough for the use of themselves. Chapter 9…

Chemical Studies

a) The teller at the bank with brown hair and brown eyes and is taller than the other tellers. b) I caught four fish at the seven o’clock in the morning but didn’t catch any at noon. c) The salaries at Smith and Company are based on the number of sales and Billy makes 3,000…

Science and PE Division

Introductory Chemistry 1405 for non-science majors is designed to meet the needs of students with no background in Chemistry or who are in need of additional preparation before taking Chemistry 1411. This course is concerned with the study of matter presented at an introductory level. The prerequisite for this course is DMAT 0091. Topics covered…

Organic Chemistry Experiment 4 – Recrystallization

INTRODUCTION Recrystallization is the primary method for purifying solid organic compounds. Compounds obtained from natural sources or from reaction mixtures almost always contain impurities. The impurities may include some combination of insoluble, soluble, and colored impurities. To obtain a pure compound, these impurities must be removed. Each is removed in a separate step in the…

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