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Chemistry Essays

Chemistry essays are different from those who are more related to creative writing. They should be based on critical thinking, logic, and proper evaluation. Sometimes these essays are built on solving chemical equations and other problems. You need to have the solid theoretical background to prepare homework which deserves the highest grade. When students cannot cope with the tasks alone, they seek help at writing service. Our company is one of the best in this specialization. We do not only offer free samples on any topic but help with preparing the entire work within the quickest time.

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Vescosity Test

Aim To determine which of these: diethyl ether, Propionic acid, 1-butanol, and 1-hexanol are most viscous through an evaporation method. Hypothesis Propionic acid is going to be the most vicious because the stronger the intermolecular forces the more viscous. Its molecular formula is C3H602, the C is bonded to an …

Using Hess's Law to Calculate Enthalpy Change

Controlled variables – Mass of water – Mass of magnesium sulphate anhydrous – Mass of MgSO4.7H20 Materials 1) Safety spectacles 2) 2 filter papers 3) Spatula 4) Digital balance 5) 2 polystyrene cups 6) Thermometer 7) Magnesium sulphate anhydrous 8) Magnesium sulphate-7- water 9) Distilled water 10) Measuring cylinder Procedure …

Ammonium Chloride Enthalpy Lab - Data Collection and Processing

Information Used: Specific Heat Capacity of Water = 4.186J/g oC Specific Heat Capacity of NH4Cl = 3.95J/g oC Trial 1: Step 1: Calculate Moles of NH4Cl (Mass / Molar Mass) = (3.50 0.01 / 53.49) = (3.50 0.28% / 53.49) = 0.07 0.0002 moles Step 2: Calculate the enthalpy change …

To Calculate the Percentage Composition of the Mixture of Na2CO3 + NaHCO3

Aim – To calculate the percentage composition of the mixture of Na2CO3 + NaHCO3 Procedure 1) Weigh a perfectly dry crucible with properly fitted lid. 2) Weigh the crucible with 1 gram of the mixture. 3) Heat the crucible with a partially open lid for 10 minutes with low flame …

The Effect on Osmosis on The Egg Shell

Osmosis is the transport of water molecules from an area of their high concentration (hypertonic solution) to an area of their low concentration (hypotonic solution) through a semi-permeable membrane1 such as cell membrane. This tendency, when water molecules move from one region to another is called the water potential. Osmosis …

Osmosis in Potato

Defining problem and selection variables Purpose: The purpose of the experiment is to show how varying the concentration of salt solution affects osmosis in a potato piece. Background: * Osmosis: Diffusion of water molecules across a membrane from high concentration to low concentration. (Biology, Sixth edition – Campbell, Reece) * …

Investigating Macromolecules and their Properties

Introduction: Background: There are many nutrients that are present in an organism that provides it energy in order to grow and reproduce. Some nutrients are required in larger amounts compared to others. These nutrients, that are required in larger amounts, are known as macromolecules. Identifying and distinguishing these macromolecules can …

Estimating Errors in Chemistry

There are two types of error which occur in measurements: 1. Random Errors Random errors or uncertainties cause repeat measurements to vary and be scattered around a mean value. Averaging a number of readings helps to reduce random uncertainties. Precision Precise measurements have a small random uncertainty. Measurements are more …

Investigation on Solubility of Different Chemicals

Aim: My partner and I would like to investigate the solubility of different chemicals when placed into 25cm3 of water. Hypothesis: I think that sugar will be the most soluble chemical. By this I mean that the sugar will be able to dissolve in the water even after 12 spatulas. …

The Reaction Time

The focus of this study was to investigate how the participation of different sports activities affects the reaction time. Two hypotheses were established based on my research question: “People who carry out sports should have a faster reaction time than those who do not” and “The sport where a fast …

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