Polyvinyl chloride

Introduction: Hot packs work by dissolving a salt, such as calcium chloride, in water to create an exothermic reaction. When salts are dissolved in water it requires energy to break their bonds apart, but energy is also released when the ions are surrounded by the water molecules. If more energy is released than is required to break the bonds, the reaction will be exothermic and will produce heat. In hot packs the water is kept separate from the salt, and when it needs to be activated, they are…

DEVIATION BACKGROUND: On 07/28/2017, During the inspection of PRODUCT A on TP- 18, while the operator was transferring the coated tablets into a plastic scoop, which is used to load the coated tablets into the printer product hopper during the printing, what appeared to be a live and small gnat fly was observed inside the product bag. This was discovered after the operator pulled the product liner off the coated drum to pour the remaining tablets into the scoop. Per routine procedure, during…

We all know that we have our own unique fingerprints but did you know that you can make sun prints? You may be wondering what a sunprint is, a sunprint is like a unique type of photo made with special sunprint paper that with the help of the sun creates a permanent image. A sunprint is formed when a chemical reaction happens with chemicals inside the paper,but before we talk about that, here is how you make a sunprint. You can make a sunprint by placing an object on a sheet of sunprint paper,…

This experiment was performed at the University of Louisiana at Lafayette campus on March 7, 2017. Pots were prepared using 30 0.95-liter black plastic pots. Each pot was labelled sequentially from 1 to 30 along with the soil treatment it would receive, either 100% vermiculite or 90% vermiculite, and the planting density, either 1, 2, 4, 8, or 16 seeds planted. The 100% vermiculite soil treatment was then prepared by using a clean 0.95-liter black plastic pot and adding 15 pots of vermiculite to…

Examined T. californicus ability to handle high temperature stress under short-term, small exposure to high temperature, and long-term, persistant exposure to constant high temperatures. The took populations of T. californicus from 11 pools at different latitudinal gradients in a local scale. They put the specimen in petri dishes with founding adult females. They only mate one time and store the sperm so they can produce many groups of offspring. To test if inbreeding could influence the…

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…

Introduction Chlorophyll absorb light energy through photosynthesis. However, light can have different frequencies, which are visible through color. This experiment seeks to measure the effects on the different light frequencies, and therefore different light colors, on the rate of photosynthesis. Also, objects appear to be the color of whatever light they do not absorb. This occurs because light frequencies which are not absorbed bounce back, creating the color appearance of an object.…

Purpose: The objective is to separate the heterogeneous mixture of salt, iron filings, and salt into each pure form using filtration, evaporation, and magnetism. Background: When separating a mixture, preferably to separate a mixture that includes a soluble liquid and a insoluble solid, filtration is the best because solid molecules are bigger than liquid molecules. A filter contains pores that are small enough to let small partials though the pores while holding back the larger particles.…

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…

Question: How does functional groups on ethane impact the exothermic energy released during the combustion of the compound? Hypothesis: Equipment: Thermometer Ethane Ethanol Ethanoic Acid Fire and a skewer Weighing scale Ceramic Container 400ml beaker Aluminum foil Lab coat apron Safety goggles Retort stand and ring clamp Procedure: Wear your lab coat / apron and your safety goggles. Prepare 100ml of water into a beaker then cover it with an aluminum sheet. Poke a hole through the…