Category: Chemistry

William Lawrence Bragg was born on March 31, 1890, in Adelaide, South Australia andwas the first of three children. Five years later, Germany had stumbled upon the newphenomenon of x-rays, which would have a major impact on Bragg’s life later on. At nine yearsold, Lawrence enrolled in Queens School, excelling in mathematics, chemistry, and physics.During the year of 1901, Bragg started high school at Saint Peter’s College, Adelaide, where hestudied mathematics and chemistry and where physics were nonexistent. Because Lawrence wasso far ahead of his peers, he completed high school at the age of fifteen. Also in Lawrence’syouth, he used […]

Cosmetics are an essential part of mostly every woman’s daily routine. Make-up has become such a popular way of defining one’s “beauty”. Everyday women wear makeup to feel put together and ready to face the day. I find that when someone has a bare face with no makeup on, they find themselves as “ugly” or that they look bad. Some thoughts that I have when doing my makeup is, “Can foundation be so toxic that without a primer, could cause damage to our skin?” and “Do we really know what ingredients are in our cosmetics that we use on a […]

15. 7.3 Importance of Dissolved Oxygen (D.O) in water            The concentration of dissolvedoxygen in water is of vital importance for the support of aquatic life.. Lowerthe concentration of dissolved oxygen, more the water is polluted. Dissolved oxygen of a sample of wateris defined as the mass of oxygendissolved in unit volume of water. It is usually expressed in parts permillion (ppm). The optimum usage value of D. O for domestic use is 4-6 ppm whichis able to maintain aquatic life.         Oxygen reaches water through two sources. The first is that oxygendissolves at the surface of the water from the atmosphere. Still […]

Gas Temperature and Gas VolumeStep One: Conducting theInvestigationIntroduction:Thisreport discusses an experiment to investigate the relationship that existsbetween temperature and volume of air in a sealed syringe that is either heatedor cooled with water in different temperature.  Charles’ Law,whereV is the volume, T is temperature, and k is constant of proportionally, statesthat the volume of a given amount of gas held at constant pressure is directlyproportional to the Kelvin temperature. For comparing the same substance under two different sets of conditions,the law can be written as,and it shows that as thetemperature goes up, the volume also goes up, and vice versa. Inthis […]

The purpose of this assignment is to learnhow to gather accurate data, format tables and plots correctly, and learn aboutreferences, what we need to cite, and how to ensure that our work is notplagiarized. I think that this assignment will present certain difficulties ingathering information, and formatting it properly. However, while thisassignment will cause some strife in collecting and properly presenting data, Ithink that it will help me learn to write an organized and effective report. This work will help me meet my goals ofbecoming a proficient report writer so that in the future, I will know how to.This report will […]

 Group Members:·           Luke·           Molly·           Ellis ·           Taylor  Aim:To investigate how theconcentration of the reactant will affect the reaction rate of Magnesium metal+ Hydrochloric acid à Magnesium chloride + Hydrogen.  Introduction: A chemical reaction is aprocess in which two or more substances collide with each other and combine toform a new substance (Paul M. Treichl, 2017).  Rate of reaction is the speed at which thechemical reaction at which it occurs (Laidler, 2017). For example, a lowreaction rate means that the molecules are combining at a slower speed. TheParticle Theory or other wise known as Kinetic Molecular Theory addresses thenature of the particles and how they behave. “Thekinetic theory […]

Utilization of nanodiamonds canimprove the efficiency of engines by adding it into lubricants which decreases thefuel consumption by ~5%. It is presume that this take hold the effect dueto the presence of graphite in the soot which is responsible for lubricationand frictional coefficient was reduced due to polishing roughnessdecreses on sliding surfaces by nanodiamonds110. Even though, itis noticed that the purified nanodiamonds spread alone or withpolytetrafluoroethylene (PTFE) or metal nanoparticles in greases or oils whichcan improve the tribiological performances. In fact, it was considered that thenanodiamonds acted as ‘ball bearings’, but this has not been established asuniversal in  new studies, which willshow that various lubrication mechanisms could […]

IntroductionWhen presented with three identical clear and colorless solutions, there are several tools a chemist has at their disposal. Methods of analysing unknown substances can be qualitative or quantitative. Since qualitative methods are less exact, qualitative analytical techniques are more widely used and widely accepted. These include chromatography and mass spectrometry. Chromatography is This research has many practical applications, such as aquatic toxin identification and forensic science. There is research supporting the coupled use of chromatography and mass spectrometry equipment to provide toxicologists with specific identification of unknown substances (Saint-Marcoux, Lachâtre, and Marquet 2002). However, this method may be overly […]

One of themost important artificial processes through which hereditary material is manipulatedthrough the Polymerase Chain Reaction, or PCR. PCR is a chain reaction thatallows the duplication of a particular DNA sequence, allowing thousands or millionsof said DNA sequence to be duplicated in a short amount of time, cheaply andeasily.                PCR was improved upon to itscurrent state in 1983 by Kary Mullis, a biochemist who won the 1993 Nobel Prizein Chemistry for his efforts. In its current state, PCR can be used for avariety of applications, such as in gathering evidence for legal proceedingsand manipulation of DNA sequences for experimental purposes. […]

A Curie for the Cure From the first woman professor to the first woman to receive a nobel prize Marie Curie was able to change the way women were viewed in the science community forever, and was able to be a role model for thousands of women in many years following her death. With her discovery of Radium and the effects of radiation there have been leaps and bounds in the advances towards the cure of cancer and treatments for it. Even with everything against her, Marie Curie was able to be the most impactful women in the history of […]