Organometallic chemistry

Paragraph 1 The research done by Haines on how the atomic structure of FePO4 varies when temperature increases from 294K to 1073 shows few crystal chemical relationships between SiO2 and FePO4. There is a first order variation of cell parameters and atomic orientations with temperatures lower than 980K and α-phase plays a dominant role over β-phase at high temperature. For the α-phase FePO4, the cell parameters increase with a non-linear trend when temperature increases linearly. The volume…

What are buffer solutions? Buffer solutions are solutions in water that mark the mixture of acids and bases. They assist in neutralization response to a certain quantity. Acidic buffer answers are those that have robust acids and weak bases as their components. they're used for neutralizing alkaline solutions. Alkaline or primary buffer answers are those who have sturdy alkalis and weak acids within themixture. they're used for neutralizing acidic aqueous answers. Buffer solutions in the blood…

Aims: The objectives of this experiment are to carry out the process of synthesising aspirin and reinforce both the skills of recrystallisation and melting point determination. In this experiment, we are supposed to measure the amount of aspirin collected to calculate the percentage yield of aspirin. Apart from that, we are also required to find the melting point of aspirin. Introduction: 1.1: aspirin Aspirin, also known as acetylsalicylic acid, is an aromatic compound containing both a…

Measurement of glutathione Glutathione (GSH) is a ubiquitous tripeptide which serves several vital functions including detoxifying electrophiles, scavenging free radicals and providing a reservoir for cysteine. The sulfhydryl group of GSH reduces 5-5'-dithiobis (2-nitrobenzoic acid) (DTNB) and form the yellow colour product 5-thio-2-nitrobenzoic acid (TNB)21. Measurement of the absorbance of TNB at 412 nm provides an accurate estimation of GSH in the sample. Figure 7. Materials 5×105 cells/mL…

Extraction of Lipophilic and Hydrophilic Antioxidants A modified method was used to separate the lipophilic and hydrophilic extracts of tomato (Toor and Savage 2005; Teow et al. 2007; Kotíková et al. 2011; Riahi and Hdider 2013). In brief, 1 g of freeze-dried sample powder in 20 mL hexane was ultrasonicated by ultrasound assisted extraction (Ultrasonic Sonicator, RF103H, Bandelin Sonorex, Germany) for 20 min, and the mixture was transferred to centrifuge tube and centrifuged at 4000 rpm for 10…

The experiment made use of two reactions in synthesizing 1-phenylazo-2-naphtol, also known as Sudan-1. The first is the diazotization reaction in which a diazonium salt is formed from the conversion of primary aromatic amines, such as aniline, to compounds with the nitroso functional group using a nitrous acid, such as HNO2. The diazonium salt was then used as an electrophile in a coupling reaction with an aromatic compound, β-naphthol. Recrystallization was conducted and yielded 0.18 g of a…

SYMMETRY WRITING EXERCISE PARAGRAPH I FePO4 is a type of -quartz, and when the temperature is relatively low, FePO4 still has the tetrahedral structure as seen in Figure 1. The Fe-O-P bridging angles are more similar between the FePO4 and -quartz. Change in the cell parameters become more significant between temperatures of 294K and 1073K, and it slowly acquires an octahedral structure as the temperature increases. When temperature reaches 980K, the compound transitions and the tilt angles…

Phase Diagram and Phase Transformation Fig. 1 shows (FCC) Nickel-(BCC) Chromium binary phase diagram. The eutectic reaction takes place at 1345°C and the composition is 51% Cr and 49% Ni. The solid solubility of Cr in Ni is extensive which is evident from the phase diagram. Phase transformations of two Ni-Cr alloys are explained below. One is Ni40Cr60 (Line 2) which is closer to eutectic composition and contains greater % Cr and the other alloy is Ni68Cr32 (Line 1) which contains greater % Ni.…

Raj Bose IB Chemistry HL Period 4 15/10/2014 Research Question: How does increasing the concentration of copper (II) nitrate solution in a voltaic cell affect the voltage produced? Variables: Variables Description of the variable Method of controlling variable Independent Concentration of copper (II) nitrate solution used in each trial of the experiment. N/A Dependent The voltage being produced by the two electrodes which is measured by the voltmeter N/A Controlled Concentration of the zinc…

Kurt Vonnegut was academically proficient; he completed his preliminary education from short ridge High School in Indianapolis in 1940. Then he went to Cornell University, where he studied biology and chemistry as a major subject. At Short ridge High, Vonnegut wrote for the students paper, The Echo and he continued his interest in journalism at Cornell, becoming the Managing Editor of the student paper, The Sun. Vonnegut writings are crisp and he is known for his declarative style, much like…