Chemistry

Natural causes of climate change within the model are livestock (cows) producing methane gas. Human-made causes that can be seen are deforestation for crops, homes, and businesses. Pollution from cars and planes realeases CO2 into the air and the use

Jeff Marasigan Abstract Gravimetric analysis is based on the quantitative isolation of the desired constituent the analyte of interest from the sample in highly pure form or in some combined form and weighing the isolated constituent. The desired constituent is

More than 50% of fertilizers are composed of nitrogen, phosphorus and potassium because these three nutrients are essential but are deficient in soils. To ensure good quality of fertilizers, it is significant that the amounts of these nutrients are quantified.

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Two different digestion methods were followed, and both confirmed the presence of Ba and Fe, although the concentrations obtained by each method differed: higher values m/m% was obtained for all samples digested by HCl than for samples digested by acetic

A solution is a homogeneous mixture, made up of a solute dissolved in a solvent. Ex. In a water (aqueous) solution of sodium chloride, the sodium chloride is the solute and the water is the solvent. Solute – the component

It is the phenomenon in which a substance is uniformly distributed all over the surface. Difference between adsorption and absorption: Absorption (i) It is the phenomenon in which a substance is uniformly distributed throughout the bulk of the solid. (ii)

To find out difference in the heat of combustion for different types of alcohols. Hypothesis The higher the number of carbon atoms in an alcohol is, the higher the energy for the heat of combustion. Alcohol is a homologous series,

The purpose of this lab experiment is to determine the Ka value for the indicator bromcresol green using spectroscopy. Bromocresol green is a weak organic acid; therefore, it doesn’t reacte to completion, rather it reacts to a dynamic equilibrium, the

This lab demonstrates the difficult task of separating mixtures using different types of methods. This study is performed because it helps you understand the concept of separation and certain characteristics of elements. Previous knowledge in which already exists in this

In this experiment we synthesize the tertiary alcohol triphenylmethanol from a Grignard reagent. The Grignard reagent was synthesized from bromobenzene and magnesium and then reacted with benzophenone to produce triphenylmethanol. The Grignard reagent is considered to be an organometallic reagent,

In chemical kinetics, it is stated that a forward reaction’s rate is dependent on the given concentration of the reactants. In other words, the relationship of the rate of a reaction is directly proportional to the concentration. While the reaction

Batteries have proven to be the core of modern day technology, without batteries modern day technology and some electronics would have never existed. Nations that invest more in battery run technology tend to have a higher labor productivity rate. This

Appearance and Hardness of materials Object /Material Appearance Hardness (Shiny/Dull) (Very hard/ Not very hard) similar change if we try to beat a wood log ? Let us find out. Activity 4. 1 Take a small iron nail, a coal

An acid is a group of chemicals. Acids are positively charged ions, they are liquid and are solutions of pure compounds in water. If you want to know if something is an acid, you can test it by using litmus

GE Global Asset Protection Services (GE GAP Services) layout and spacing recommendations are for property loss prevention purposes only and are intended for existing and new oil and chemical facilities. These guidelines are intended to limit explosion overpressure and fire

The aim of this experiment is to investigate the properties of several substances with the purpose of determining whether they are molecular, ionic, macromolecular or metallic. Introduction Chemical substances could be named ionic, molecular or metallic substance, based on the

Water potential is the measure of free energy of water in a solution. The purpose of this lab was to find the water potential of a potato cell. The problem of this lab was, if there was a high molarity

The goal of the first part of this experiment was to achieve a 50-50 conversion of fluorene to Fluorenone. In order to achieve the goal of the experiment fluorene was oxidized to Fluorenone. The hydroxide ions from the sodium hydroxide

The purpose of this experiment was to use solvent extraction techniques in order to separate a mixture consisting of a carboxylic acid (p-toulic acid), a phenol (p-tert-butylphenol), and a neutral compound (acetanilide). Extraction is the process of selectively dissolving one

The chloride ion (Cl-) is an important anion found in solids and solutions. In this experiment, the amount of chloride ion in an unknown sample J (NaCl + KCl mixture) of water using the Mohr method is determined, which relies

Investigating how the concentration of sodium-thiosulphate (STS) and hydrochloric acid (HCL) affects the rate of reaction in the experiment. In addition I am also checking how different variables affect my experiment and also how I can make my test more

Pour H2SO4 into HNO3. Do mix up thoroughly by pouring to- and fro- many times. This mixing warms up. Dip the tube into a 150 ml beaker filled with ice. When the tube is colder than 10°C, add 10 drops

A titration is a method of analysis that will allow you to determine the precise endpoint of a reaction and the precise quantity of reactant in the titration flask. A burette is used to deliver the second reactant to the

The energy of the subshell increases as follows:4s<4p<4d<4f * “4s” has the greatest probability of being close to the nucleus * Subshells are limited to # of electrons they can hold ( 2 electrons per orbital) s=21s orbital d=105d orbital

To extract the carotenoid pigments from canned tomato paste and separate them by column chromatography to obtain a solution that contains lycopene. Then record the ultraviolet-visible spectrum of this solution and analyze it for evidence of isomerization. Calculation List of

The same reaction is catalysed by the enzyme catalase, found in the liver, whose main function in the body is the removal of toxic byproducts ofmetabolism and the reduction of oxidative stress. The decomposition occurs more rapidly in alkali, so acid is often added as a stabilizer. The

Learning how to name and draw the structure of the various compounds is the first step in learning to speak the language of organic chemistry. Chapter 1 presented organic chemistry as the chemistry of the carbon atom. However, many organic

Bioethanol fuel is (Bioethanol Fuel. Com) “mainly produced by the sugar fermentation process, although it can be manufactured by the chemical process of reacting ethylene with steam” Bioethanol comes from an renewable resource that mainly grows in the United Kingdom.

Tin is a chemical element with the symbol Sn from the Latin word “stannum. ” Its atomic number is 50 and its atomic mass is 118. 71. Tin is classified in the ‘Other Metals’ section which can be located in

Enzymes are proteins that act as catalysts to regulate metabolism by selectively speeding up chemical reactions in the cell without being consumed during the process. During the catalytic action, the enzyme binds to the substrate – the reactant enzyme acts

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