Chemistry Essay Examples and Topics. Page 2

The volume of the mixture was made to 200 mL in a measuring cylinder. The concentration of the protein in the supernatant was determined using a biuret reagent.

Pour the elution solvent to the silica gel then, using a gas pump, force the solvent through the silica. Without disturbing silica's top surface, the dissolved sample in the elution solvent is then gently applied [...]

According to Stein, the value of the index describes the stability of the calcium carbonate contained in water. In the event that the value of LSI is at zero, then water is said to be [...]

The rest are artificial isotopes and, are a consequence of radioactivity. The table below shows a summary of the radiological properties of strontium isotopes.

The exceptional properties of polymers are determined by the extent and the organization of the molecular chain. According to Kurtz, the melting temperature is an indicator of the thickness and flawlessness of crystals.

Considering the structure in the figure above, it is evident that a molecule of water has a line of symmetry that can be traced through the water molecule, acting as a bisector of the angle [...]

The difference in the energy of the impinging X-ray and the ejected electrons gives the binding energy of the electron to the atom.

He schooled in Turin and having come from a family background of lawyers, his career was oriented towards law whereby at the age of 16 years he had already become a bachelor of jurisprudence and [...]

In conclusion, the scope of use of chromatography is wide and through chromatography the study of chemistry has been made a much more rich experience.

The objective of this report is to evaluate the properties, limitations, and prospects of future applications of fiber-reinforced concretes and polymer reinforced concretes.

Green chemistry can be described as the abolition of the use or production of harmful substances in the creation, making, and use of chemical commodities.

The geometry of the reactant complex was optimized and scanned to find the lowest energy pathway to bond hydrogen and oxygen atoms of abstraction of the closest hydrogen from the alpha and beta carbons in [...]

Molar mass: 118. Molar mass: 18.

The paper describes the milestones of the three-step analysis, the calculation of product yields, and the comparison of empirically measured wavelengths of maximum absorption with literature data.

Hypothesis: If iodine is added to liquid food items, such as peas, corn, and carrots, then the iodine will turn a dark blue-black color, indicating the presence of starch.

The chemical compositions of the reacting elements or compounds dictate the nature of the reaction. The chemical reaction entails the combustion of methane gas in the presence of oxygen gas, which are the reactants.

The researchers note that their experiment was designed to mimic the primitive earth's atmosphere and not the ideal conditions required for the development of amino acids. At the experiment's conclusion, the solution in the flask [...]

The purpose of this laboratory work was to evaluate the ideal gas law for the case of gas in a syringe when the pressure was increased.

Jensen explains that spectrophotometers can be used to make measurements where previous methods were unable to, like measuring the amount of light absorbed by a substance at different wavelengths.

Isopropyl is synthesized in two steps: through the reaction of propylene with sulfuric acid and the consequent hydrolysis. In the context of isopropyl alternatives as sanitizers, ethyl alcohol serves as a solid option.

The core idea of the collision theory is manifested in the notion that reactions only occur when particles collide with each other.

As for the second array of the reasons why chemistry is really important, they are concerned with people's ability to produce various products.

At the moment of the impact between pendulum and specimen, part of this potential energy is used to fracture the specimen.

The experiment aims to illustrate the way substitution reactions of alcohols transpire. In particular, the experiment aims to illustrate the way 1-butanol undergoes nucleophilic substitution reaction resulting in the formation of 1-bromobutane.

Moreover, in the first and the third groups, the wheat seeds were placed in wetted paper towels whereas in the second and the fourth groups, the wheat seeds were placed on top of the wetted [...]

The purpose of the study was to establish the amount of olefin, gasoline and other crude oils that were to be produced in the exercise. To study the properties and applications of olefin and naphtha.

In order to maintain the proper percentage of Vitamin B6 in the patient's body, it is imperative that the dietary allowances of the vitamin should be in direct proportion to the patient's age; more to [...]

The pH of the acid was measured and recorded. The pH of the buffer was also measured and recorded.

Dry Ice if put in water, starts melting, and soon it becomes gaseous, as the temperature of CO2 increases. If it is placed in a bottle, the gas pressure tears the walls of the bottle.

The aluminum industry in Australia is its economic backbone as it is one of the major products produced in the country and is a direct source of income to over 16,000 Australians.

Some of the chemical processes used in the bottom-up approach include sol-gel process, the reaction of molecules in a flask, reverse microemulsion and flame synthesis, which have been used to make silica nanoparticles, nanozeolite, nanocatalysts [...]

The acidification of water bodies leads to the death of numerous species that are susceptible to the presence of acid. Part of the problem is caused by the fact that Hungary is currently forced to [...]

The table is best illustrated by vertical and horizontal lines of elements with the latter called groups while the former are called elements.

Therefore, the gluten content of flour affects the physical properties of flour and the corresponding baked products. The leavening agent was baking powder, which consists of sodium bicarbonate and potassium bitartrate.

The salt sample was then put in a plunger to be compressed followed by measuring the height of the compacted sample, which was 7 cm. Other chemical elements that were found in the salt specimen [...]

Molar mass: 118. Molar mass: 18.

The general background provides information on the various terms used to describe nylon, the history of nylon, a comparison between nylon and other natural materials, such as cotton and silk, and the standards set aside [...]

5 The popularity of polyethylene is rooted in the fact that this polymer is cheap, flexible, durable, and chemically resistant6 It is important to take a closer look at the manufacturing process in order to [...]

The heating facilitates the production of formaldehyde gas that bonds the hair with the conditioner. The entire process exposes customers to the risk of inhaling the formaldehyde gas that has negative effects on the body.

Therefore, temperature is the determinant of the absorption of the vapor of the combustible liquid by the air. The flashpoint of a liquid is the least temperature, which there will be enough concentrated vapor of [...]

As a matter of fact, oxygen is present almost everywhere forming two thirds of the body mass of a healthy human being, it accounts for half the mass of the crust of the earth as [...]

However, it is this severity of the social as well as the environmental issues associated with the production of the mineral that has generated a big concern from the global authorities leading to interventions of [...]

In the forensic labs, rudiments of environmental wellbeing and safety should be strictly considered. The required quantity of chemicals should be used in crime scenes, and excess spillage must be cleaned.

Towards the end of the 18th century, many substances were identifiable in laboratory and the new Lavoisier concepts led to the replacement of the phlogiston theory.

If my hypothesis is correct, then at room temperature, the enzyme activity will be moderate, and the filter paper squares will rise to the surface at a moderate rate.

For instance, elements of period 3 have three electron shells, and their properties reflect the filling of these shells. S-block: Found on the left side of the periodic table, the s-block elements have their outermost [...]

The purpose of using stoichiometric relations in the study of chemical processes is to investigate the reactions taking place, determine the percent yield, and evaluate the observance of the law of conservation of mass.

This acceleration is based on the attachment of the substrate to the enzyme's active center, and this attachment is specific, which means that each reaction requires a particular kind of enzyme.

The glassware is fixed in the foot of the tripod at a distance of several centimeters from the opening of the test tube or flask.

In the case of mitochondria, this is explained by the fact that in the respiratory chain there is a "leakage" of electrons from I and III mitochondrial enzyme complexes, due to which about 2 5% [...]

The peculiarity of the first stage of synthesis is the creation of a peptide bond by joining not the - but the -carboxyl group of glutamic acid to the amino group of cysteine.

The use of chlorine atoms as components of the polymer framework was also shown in Mart n et al; the presence of chlorine allowed a reduction in the total carbon fraction of the polymer, resulting [...]

To put it another way, despite the higher gas trapping capacity of COP-130, the retention rate of this substance in the organic framework was higher for COP-140, in which it was trichloromethane used as a [...]

Lysine also plays a vital role in the immune system, as it helps the body fight off viruses and bacteria. It is also essential for hormone production, as it helps the body produce hormones such [...]

Results and outcomes of the experiment IR spectrographic analysis was performed for the obtained substance, the result of which is shown in Fig.1.

A radioactive isotope is one that has an unstable nucleus, meaning that it can break apart and release a lot of energy. Fission releases energy by splitting the nucleus of a heavy element into two [...]

The choice of Glucose in the study is essential since it helps the body to function correctly as the primary energy source in the body cells.

Essentially, this was the case in this paper; however, the interchanging of methods to the end interfered with the normal flow.

In fact, the LIBS device has a two-pulse characteristic: the first laser pulse ablates the detachment of matter from the substance and the accompanying heating, and the subsequent second pulse is aimed at additional excitation [...]

This procedure is also performed in this reaction, where a sodium hydroxide solution with the specified characteristics was used as the titrant and potassium hydrogen phthalate was used as the test solution; three tests in [...]

The arrangement of the tubes in this order was compared with the corresponding arrangement in the peers in order to check the literacy of the color ranking and to identify the ligands without errors qualitatively.

Accordingly, the application of magnesium in nature is based on its aid to plants and animals. The application of magnesium in real life is necessary to produce different items and support health.

The emerald laser is a solid-state tunable laser that emulsifies fat in the tissue under the skin. The primary role of the emerald laser is in low-level laser therapy.

It is necessary to explore in more detail exactly in which cases dry ice is used, what are the alternatives and why this method is extremely dangerous when interacting with concrete.

The concentration of the element has been assessed in the local water intake in Poznan, while comparing the safe concentration of mercury according to Polish laws and the WHO.

While focusing on the first chemical reaction known as analysis reaction it could also be termed chemical decomposition and it is also one of the most popular chemical reaction types.

Osteoporosis, or atrophy of bone tissues, is spoken of if the transformation processes lead to a significant decrease in bone mass and an apparent violation of the microarchitectonics of the bone.

This paper will examine the literature on stable radicals, their synthesis, and the functions of the main families of stable radicals.

It is believed that the tremendous success in the field of the introduction of zeolites is connected with oil refining. The article will focus on zeolite ion exchange and the definition of sodium zeolite as [...]

However, the basis has remained unchanged; namely, the addition of a dienophile to a diene by 2,4-conjugation allows the preparation of non-aromatic homocyclic with one multiple bonds in them.

The purpose of this report is to describe the history, structure, properties, and applications in real life of amorphous solids. The molecules of an amorphous solid have a short-range order of action.

The paper describes the symptoms of toxicity and deficiency of iodine and vitamin C as well as their impact on people's organisms.

In the conversion of the precursor substance tyrosine to dopamine, the following process occurs: the rate-limiting biomolecule in catecholamine production is tyrosine hydroxylase.

In the human body, hyaluronic acid performs the crucial function of retaining moisture in the tissues and acts as a lubricant for the joints. Even though hyaluronic acid is a component of the body, the [...]

The work of a spectrophotometer is based on this law to calculate the amount of light, its absorption, and concentration. Spectrophotometry is necessary to demonstrate how non-destructive methods help check the condition of the water, [...]

This paper examines the sources of PFAAs contamination in the environment, their effects on animal and human health, and the existing U.S.policies regarding PFAAs.

However, regarding the title of the article, the examination of the gel formation is missing in the abstract, and several questions about the chosen research process emerge. The next section in the article is devoted [...]

An essential condition for the transition of substances to the state of liquid crystals that is for the potential for the existence of such materials is the presence of an asymmetric form of the molecules.

The main elements that constitute the definition of NMR include a magnetic field and an oscillating magnetic field. In spectroscopy, a sweep generator may be used to produce a magnetic field equal to that passed [...]

In the second part of the work, a mixture of 10 g of solid calcium hydroxide and 50 mL of drinking water in a beaker was initially created.

It was shown that the higher the concentration of the polymer in the solution, the slower it flows through the vertical capillary.

This thought was the basis of this laboratory work, the purpose of which was to study the chemical and physical interferences for Calcium atomization and some of the techniques for overcoming them. The results of [...]

The boiling point denotes the temperature position where the liquid-vapor pressure establishes an equilibrium with the atmospheric pressure, thus necessitating the liquid to transform into the gaseous phase.

The objective of the experiment was to determine the elemental concentrations of ten ayurdevic drugs obtained from the neighboring markets. The introductory part of the report is not exhaustive, especially in the techniques that can [...]

The objective of this experiment was partly to determine the behaviour of PH curve of a triprotic acid and hence determine its pKa value, and on the other part to determine the concentration of an [...]

Compaction and mixing are some of the important stages in the manufacturing process. As such, when it is hot, temperatures are high and the viscosity of the fuel is reduced.

Part of the crude product was recrystallized from ethanol and the remaining part was purified by column chromatography in the second week.

The chemical synthesis of 4-chlorophenoxyacetic acid is realized through the reaction of nucleophilic displacement between anions of the 4-chlorophenolate anion and chloroacetate, the product of interaction of which is subjected to acetic acid treatment.

Consequently, scientists investigated the opportunity to create unique microorganisms that would be able to produce the silk with nanocrystals in the same amount as in natural spider silk.

If the power between the two atoms is the same they share the electrons and form a covalent bond, but if one atom's power exceeds the other, then one loses the electron or electrons to [...]

The presence of ROS in excess causes oxidative stress in the body, leading to the oxidation of proteins and lipids and the transformation of their structures and roles in the body.

The essence of the method of measuring BOD is to establish the concentration of molecular oxygen in the water sample immediately after the selection and after incubation periods of the sample.

Only the ascorbic acid or vitamin C in the drink will react with the dye. The reduction of vitamin C will be negligible.

In a laboratory experiment, when a blown ball is over ice water, the kinetic energy of the molecules' fluctuations is transferred to the water.

With the current technologies, an electrolyzer working at 100% efficiency needs 39 kWh of electricity to liberate 1 kg of hydrogen.

The choice of method is determined by the chemical compound to be analyzed, the time available, the level of accuracy needed and the available time.

This is what triggered the research fronted by the Professor to determine the degree of caffeine in decaffeinated coffee brands, in the market.

The report entails a summary of the experimental design and synthesis of the THIQ derivatives, the biochemical evaluation of the THIQ fragments, and the structural evaluation of the THIQ fragments as described in the article.

Titrometry is one of the techniques that chemical analysts use to determine the concentration of metal ions in mineral water. A buffer is necessary to provide suitable pH for the complexing of EDTA with metal.

Of note, caution was taken to minimize the time of contact with the container as this would raise the temperatures of the container hence giving a false impression of the actual temperatures.

The appropriate elaboration of this communication is through the study of Biological Engineering, which is an application of different concepts and methods of biology to get solutions to life sciences.

When the concentration of glucose was high, the color and odor of the reaction mixture were darker and more intense, respectively, due to a larger amount of products formed.

This discovery shows that the emission of Methane not only depends on the species of the plant, but also the condition in where they are growing.

The occurrence of isobutylmethoxypyrazine-like aroma in the making of wine is regularly associated with the grape variety, which proves that the methoxypyrazines are produced under genetic control in the grape berry.

Specific temperatures, therefore, are needed to be observed during the preparation of specific foodstuffs and, of course, for specific durations. The range of temperatures between 41 F to 135 F also known as the danger [...]

Synchrotron radiation is a chemical process that can also be used in the determination of the structure and composition of coating in a metal.

Important systems in the body depend on the presence of an optimum pH in the body so that the body can function properly.

Other challenges the researchers face are the constantly changing conduction properties of the anode and the difficulty in measuring the conductivity and microstructure of the solid-electrolyte film.

The metabolism of acrylonitrile is via multiple pathways but the main one involves the pairing of acrylonitrile with glutathione-S-transferase as a catalyst.

For validity and reliability of the results, sample blanks are analyzed alongside the samples to ensure that no contamination is carried over to the next sample and also to check the accuracy of the analytical [...]

The organic compound has the following structure: The compound is highly soluble in water and alcohol because it is a polar organic compound and has a molecular weight of 291.82.

In this illustration of a city, the following aspects of a city will be used to show a correlation to organic chemistry theories.

A ferrofluid is a liquid that contains very small pieces of a magnetic substance and hence acquires its magnetic properties when placed in a magnetic field. A ferrofluid primarily consists of small particles which are [...]

Determination of relationship between energy intake and energy expenditure is therefore important aspect towards determination of maximal energy expenditure, optimization of fat expenditure as secondary source of energy after carbohydrates and capacity to achieve energy [...]

Because the effects of radiation can be far reaching on the health of the workers and the people living in close proximity to areas where uranium is mined authorities should ensure that they provide information [...]

The tertiary structure is the three dimensional structure of a single molecule of a protein. The breaking of a peptide bond is by the process of amide hydrolysis.

The beaker containing all the available pennies and, also the beaker plus half the number of pennies were to be separately weighed and recorded initially before the commencement of the experiment.

It is well known that the solubility of ethanol in water is unlimited. Toxicity could be a characteristic of the formation of the reactive oxygen species which can also be present in water.

Compare the strengths of different types of intermolecular forces in molecules based on their boiling points. What are the molecules that the model uses in illustrating intermolecular forces?

The concentrations of seawater and brackish water differ considerably; hence, there is a distinction involving the concentrate acquired from seawater desalination plants and brackish water desalination plants.