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Chemistry Essay Examples

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Isopod Behavior Lab Report

Background Information: In our lab we were working with isopods, also known as pill bugs or rollie pollies. The isopods that we worked with were land isopods. They like to live in moist places under untouched objects such as boards, bricks, rotting logs and or rocks. Basically, they will live anywhere! If you are lucky…

Law of Constant Composition Lab

Purpose: To determine the percent magnesium by mass in magnesium oxide and to observe if the percentage composition is constant by comparing class results. Hypothesis/Prediction: The percent composition by mass of magnesium in magnesium oxide will not change significantly with each group that conducted the experiment. The composition of each substance should stay the same…

Meteorologist: What do they do?

Meteorologists are very involved in the world today. You might see them on T.V or hear their voice on the radio. Wherever they are they help you in many ways. The word “meteorology” refers to the Greek word meteoron. Meteoron refers to an astronomical phenomenon. The science of meteorology was eventually referred to the study…



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Investigation into temperature change

Introduction. The following is an experiment into temperature change in an exothermic reaction taking place between Sodium hydroxide (NaOH) and Hydrochloric acid (HCl) and also how the concentration of the acid will vary these results. The characteristics of the reaction feature a neutralisation, an energy change (shown as a temperature change) that is usually exothermic…

The Purity and Purification of Solids

Recrystallization is a commonly used tool in laboratories when dealing with impure solids. “An effective recrystallization is one in which 1) a high degree of purity is achieved as well as 2) a maximum recovery of sample”.1 Solubility, the tendency of a substance to dissolve in a liquid, is an important physical property of a…

Onion DNA Extraction

DNA(deoxyribonucleic acid) is found in every living organism. It provides the information and instructions to build and regulate cells in organisms. The information it contains is used when organisms are being reproduced. It is made up of two polynucleotide chains known as DNA strands. Within the two chains there are four nucleotide units: adenine, thymine,…

Chemistry Laboratory Report

Title: Factors affecting reaction ratesProcedure A: Effect of ConcentrationAim: To investigate how the concentration of a reactant affects the rate of reaction. Hypothesis: The more concentrated the reactant, the faster the rate of reaction. Materials: 2M hydrochloric acid solution, magnesium wire, distilled water, 4 test-tubes, measuringcylinder. Procedure:1)10mL 2M hydrochloric acid solution is poured into a…

Pearson Chemistry Notes

1. i. All elements are composed of tiny indivisible particles called atoms. 1. ii. Atoms of the same element are identical. The atoms of any one element are different from those of any other element 1. iii. Atoms of different elements can physically mix together or can chemically combine in simple whole-number ratios to form…

A Mentor

In life there is always a person, or role model that you will look up to and admire. A person may admire their role model, or mentor, because of their looks, wit, or even general personality. No matter who you are there is always someone that you attempt to emulate in some way, shape, or…

Title: Nucleophillic Substitution Reaction

Bromobenzene undergoes no reaction for both SN1 and SN2. This is because bromobenzene is very stable, and contains allylic and vinyllic bromine, which is also very stable, and cannot be a good nucleophile. Bromocyclopentane reacts under SN1 and SN2, but it shows a faster reaction in AgNO3/ethanol reagent, that is SN1. This is because bromocyclopentane…

Titration: Identification of an Unknown Amino Acid Biochemistry

Abstract Water is important substance for all living organisms. The physical and chemical properties of water play a central role in biological structure and function of the organism. The ionization ability of water to form H+ and OH- ions make it very unique. The hydrogen-ion concentration of biological system is usually preferred as the pH…

Titration Lab Discussion

Like any titration, neutralization titrations depend on a chemical reaction between the unknown solution and a standard reagent. The point of chemical equivalence is indicated by a chemical indicator or an instrumental measurement. When the color changes to the specified color, the titration has reached endpoint. The mole ratio and volume relates the concentration of…

The Advanced Biochemistry

The authors described different activities including (1) a seminar/poster system in a mini-congress format using topics of applied biochemistry; (2) a true/false applied biochemistry exam written by peer tutors; (3) a nine-hour exam on metabolism based on real publications; (4) the Advanced Biochemistry course directed to peer tutors; (5) experiments about nutrition and metabolism and…

Determination of nickel

INTRODUCTION EDTA (H₄Y) is widely used to determine metals in complexometric (a volumetric analysis where the formation of a coloured complex is used to indicate the end point of a titration) titrations as it forms stable complexes with most metal ions. EDTA is a tetracorboxylic acid and in alkaline conditions, it exists as Y⁴⁻ ions,…

Biochemistry perspective

Diabetes is an ailment which is caused due to high amount of glucose (sugar) in the blood. The main reason for high glucose levels in blood is due to the inability of body to utilize it properly. Glucose comes from the digestion of sugar and foods rich in carbohydrates that enable the liver to create…

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