Silver chloride

Abstract: We describe the successful synthesis of Polypyrrole-Gold nanocomposites (PPy-Au NCs) by the chemical oxidative polymerization of pyrrole with ferric chloride as an oxidizing agent, in the presence of a colloidal suspension of gold nanoparticles. Gold nanoparticles (Au NPs) were synthesized by standard citrate reduction method. Au NPs and PPy-Au NCs were characterized by Transmission Electron Microscopy (TEM), Atomic Forced Microscopy (AFM), Scanning Electron Microscopy (SEM), Fourier…

Implantable cardiac pacemakers By virtue of the light weight and high theoretical capacity of lithium metal, lithium primary batteries have been widespread in health-improving medical devices since the successful implantation of the first lithium-powered pacemaker in 1970s.29, 30 Depending on the power level, implantable medical device primary batteries fall into several categories: low-rate batteries outputting microwatts of power such as batteries for cardiac pacemakers and hearing devices;…

The solubility of Barium Sulfate can be also determined by the solubility rules whereby most sulfates are soluble in aqueous solutions except for Calcium Sulfate and Silver Sulfate, which are slightly soluble and Barium Sulfate, Mercury(II) Sulfate and Lead(II) Sulfate are insoluble. The weight of the precipitate measured was 0.1602g. However, when compared with other groups, our group’s yield was significantly lower…

Photography is not just strictly visual, it is influential, subjective, objective, and impactful. It is a means and a medium to bring about change in society or the world. The camera is a small but powerful tool to bring about social change but to also share an image, an image captured in a moment of time. In a quote by renowned American photographer Aaron Siskind, “Photography is a way of feeling, of touching, of loving. What you have caught on film is captured forever... it remembers little…

According to the history of cameras, the first camera ever developed was called camera obscura later developed into daguerreotypes, calotypes, dry plates, film, and digital cameras. An Arab person named Ibn al-Haytham was the first ever person who created the camera. He published his Book of Optics in 1021 AD. He produced the first pinhole camera after observing how light travelled through a window shutter. He realized that smaller holes would create sharper images. He is also credited with…

of this procedure to that for making chlorine suggested to Balard that he had obtained a new element similar to chlorine. German chemist Justus von Liebig supposedly had obtained the element before Balard, but he wrongly considered it to be iodine chloride.) Because of the bad odour of the element, the French Academy of Sciences suggested the name bromine, from the Greek word bromos, meaning bad smell or stench. Bromine is a reddish brown liquid with an appreciable vapour pressure at room…

The purpose of this experiment was to determine the identity of nine solutions using the results of reacting pairs of solutions in an organized systematic manner. Known solutions were used on the first day. The second day, the solutions were placed in code-labeled bottles. The reactions from the previous day were then used to help identify which solutions were which, by closely monitoring which unknown solutions mixed with other unknowns and how they reacted, such as: color changes,…

coating, and placed them over light sensitive paper. Light exposure transferred the lines of drawing or writing to the paper (Marien, 19). Soon after, Talbot found that a sheet of fine writing paper, coated with salt and brushed with a solution of silver nitrate, darkened in the sun, and a second coating of salt impeded further darkening or fading. Instead of putting this paper in the camera obscura, he copied items, such as a leaf or lace, directly on the paper. He would set the object on a…

mineral that gives the water its soft feeling in your mouth. Silica is a hard and colorless compound. Calcium and magnesium are the most essential minerals in the water. Calcium is a soft gray metal. Magnesium is a silver white metal of the alkaline earth…

Nucleophilic substitutions are a fundamental class of reactions in organic chemistry. This type of reaction involves a nucleophile, or an electron rich species, attacking an electrophilic site, or an area that carries a positive or partially positive charge, in order to replace a leaving group. There are two possible mechanisms to account for the attack of the nucleophile; the first occurs in a concerted process, or in one step and the second mechanism occurs in two steps and involves a…