Acids

Bernardi et al., (46) assessed nanoparticle calcium carbonate (NPCC) by means of transmission electron microscopy and the effects of NPCC addition to MTA in regard to the setting time, dimensional change, compressive strength, solubility and pH. , The experimental groups were G1 (MTA), G2 (MTA with 5% NPCC) and G3 (MTA with 10% NPCC). The tests followed ISO and ADA standards. The dimensional change and compressive strength tests were measured immediately after setting, after 24 h and after 30…

Much of the workflow for ceramics production remains the same over the many years this art form has been practiced. When centuries ago, a potter starting the process workflow of producing a ceramic mug (or more likely a jug), he would go to a river bed and collect the clay. Now, Angel Pottery’s supplier is currently a clay supplier in Amherst, Massachusetts. In this supplier’s factory, they use mixing augurs to produce the raw material clay. From factory to home factory, the clay bags are…

1) The samples that would float on water are water (if in an ice form), oil, methanol, 2- propanol and lead because these materials are less dense than water, which leads to them laying on top, or until they dissolve. The samples that would sink in water include aluminum and copper because they are denser than water. 2) The order of the four liquids that I would layer them in a graduated cylinder from bottom to top consist of: water, oil, 2- propanol, and methanol. 3) Working with specific…

1. Do supplements that contain a higher protein content have a lower sugar content? 2. Biuret’s Reagent is a chemical indicator that detects protein and turns violet with the occurrence of peptide bonds. Lugol’s reagent is a chemical indicator that detects starch and turns into a black brown color as a result of the formation of polyiodide chains. Benedict’s reagent is a chemical indictor that detects monosaccharides and sugars and the observed change for a positive reaction is precipitation.…

Almost all of us have to deal with cough and cold, especially during winter time, which can be really annoying, but beside that, if you don’t treat them properly and on time, they can turn into an extremely irritating and dangerous disease. Dry cough is really annyoing and uncomfortable which makes you feel worse than you should. In most common cases, the people with cold and cough are always seeking for pills and syrups in the pharmacies. Probably, they don’t know that there is easy and…

There are several physical and chemical methods, of which the simplest method involves the reduction of the metal salt AgNO3 by NaBH4 in water. Wiley and his coworkers synthesized three different shapes of silver nanoparticles using chemical method, in which ethylene glycol used as both solvent and reducing agent [5]. This group synthesized cubic silver nanoparticles by reduction of silver nitrate (AgNO3) with ethylene glycol in the presence of Polyvinylpyrrolidone (PVP) and HCl. After synthesis…

1. Fit the stem of a funnel inside the short end of a straw. Push the funnel in as far as it will go. Securely tape the straw to the funnel. Repeat for the second straw and funnel. 2.Push a straw-funnel assembly through the hole near the bottom of each container so that the funnels are on the inside of the containers. Adjust the straw-funnel assemblies so that the funnels face up. Put some modeling clay around the hole, on the outside of the container, to hold the funnel in place. 3. Start by…

More conjugated compounds absorb higher wavelengths/lower energies because as the wavelength increases the HOMO/LUMO gap (ΔE) decreases which is due to the compression of multiple molecular orbitals (ψ). According to Klein, the Ketchup stain (lycopene) on a shirt and upon application of bleach (NaClO), it breaks lycopene’s conjugation, therefore causing a decrease in conjugation; which directly correlates to the stain no longer being visible to the eye but when illuminating the shirt with…

the other three liquids. It was expected that whichever combination of liquid and black solid formed a blue solution would be H2SO4 and CuO hence, CuSO4 in solution. On identification of sulphuric acid, the following tests were performed expecting the evolution of carbon dioxide on reaction of the acid with carbonates. Therefore, among the soluble solids, (10) exhibited effervescence and was suspected to be sodium carbonate due to its solubility. The powders and crystals were divided…

Based on our observations from the Zinc and Hydrochloric Acid Lab, we concluded that the chemical reaction that occurred was exothermic and a single displacement reaction. The experiment consisted of zinc (Zn) and hydrochloric acid (HCl) being mixed in a test tube immersed in water. First of all, bubbles were produced during the reaction. Also, a white powdery substance was produced with properties different from those of any reactant. The bubbles suggest that the reaction was a chemical…