Solid State Records

methylene chloride was slowly added until all the crystals which had formed were dissolved. The liquid was filtered and washed twice with 10 mL of methylene chloride. The toluene and methylene chloride was then removed with rotary evaporator. The solid residue was…

VII. Discussion 1. Why was the solution heated and then cooled during the recrystallization of the crude acetaminophen? Recrystallization is a very important method of purification for organic solids. This process is carried out by the separation of compounds based on the difference in solubility. The steps to recrystallization can be described by the following • Choose an appropriate solvent based on the compound’s characteristics • Dissolve the compound in the minimum amount of solvent •…

quickly is due to a colligative property called freezing point depression. Freezing point depression is the process by which adding a solute to a solvent decreases the freezing/melting point of the solvent, allowing the solvent to maintain its liquid state at a much lower temperature than it usually would (Libretexts, 2016). Liquid water is better at transferring heat than ice, so the ice in the bag must be melted into water while still being cold enough to freeze the ice cream mixture. For this…

Table 3 shows the BET surface area of both the fresh and hydrothermally aged SCR catalysts. For fresh BEA zeolite and SCR catalysts, as the doping amount of catalytic additive increases, the BET surface area decreases, probably because the additive Cu, Ce, and Nb species blocked some of the zeolite channel, hindering the entry of N2 into the pores (Bin et al. 2014). After aging at 600 °C, all the samples showed 3-20 m2/g increased BET surface area. Aging condition of 600 °C is a relatively mild…

expected, it was found pure HA sample excluded magnetic properties (i.e diamagnetic behavior) and La0.1Sr0.1HA nanoparticles exhibited weak ferromagnetic ordering of hysteresis loop Fig. 7(b). The magnetization values are mainly depending on the charge state of the doped element [41]. From this study, saturation magnetization [Ms] and Retentivity [Mr] values of La0.1Sr0.1HA nanoparticles bring to 0.975 x10-3 emu/g and 0.1805 x10-4 emu/g…

Paragraph 1 Compare and contrast the crystal structures and crystal chemistry of quartz, α-FePO4 and β-FePO4. Haines’ research paper studies the change that occurs in the FePO4 structure as it is studied from temperatures 294K to 1073K. A transition is noticed at 980K, when it’s tetrahedral α-quartz structure experiences high pressure levels, changing the structure to β-phase, a more dense octahedral structure. Cell parameters of FePO4 in α-phase increases in cell parameters and volume as…

A filter is something that removes impurities or solid particles from a liquid or gas that passes through it. There has been a total of 76% of deaths due to infections from dirty liquids and poisonous gases. Not many filters do the same job you would like it to do, but with this particular filter it is made to filter out gases, liquids, and solids from a variety of different elements and objects as well as cleaning any object you toss into it. The item's frame is powerful enough to do these…

five minutes. In group B, 10 grams of rock salt was added to the ice water and stirred. The temperature of the mixture decreased from -1°C to -6°C in five minutes. After this process, we placed the mixture on a hot plate and continued to stir and record the temperature every 30 seconds. The temperature began to quickly increase and as soon as seven minutes passed the temperature increased to 95°C, which then began…

In this experiment one, are determining the melting points of different crystalline substances following a specific procedure. By finding the melting point of a crystalline substance, it helps determine what kind of compound it is as well as initiate the purity. A DigiMelt apparatus can be used to determine the melting point where a small amount of the the substance is packed into a capillary tube and heated slowly in the apparatus which includes a thermometer, a heating coil and a magnifying…

Solid solubility is whether that solid can dissolve in specific solvent or not. When a solid dissolve, the ions that comprise the solid will disperse in the solvent thus create a different concentration distribution within the solvent solution. Thus we can view this as a flow of ion from high concentration to low concentration (there’s a flow of ions) Electrical activity is the ability for electron to travel within the material. Specific solid material molecule will have free electrons to…