Liquid oxygen

The main purpose of this experiment is to purify an impure solid by the technique of recrystallization. This technique involves several steps, selecting an ideal solvent, dissolving the compound in a minimum amount of boiling hot solvent, filtering insoluble impurities while the solution is hot; crystallizing the purified compound, and isolate the pure compound by vacuum filtration . The unknown used in the experiment was #4, which were white crystals. In order to determine the ideal solvent…

During the winter in some places it can get very cold, and it might even snow. People put many different things on the ground to make the snow melt, but which one really melts the snow the fastest? Does ice melt fastest with salt, sugar, or sand. There are many things that can solve this question. In order to see if something is soluble it needs to be mixed with a solvent (water). To be soluble means that it is able to be dissolved. There are three different possibilities that can happen.…

This experiment will allow us to determine the molar mass of the unknown solute through calculating the difference in freezing point of the pure solvent and the solution with the unknown solute. This lab will show case one of the colligative properties of a solution. This property is dependent upon the number of solute molecules or ions and not the identity or chemical property of the solute. A common example is water which both freezes and melts at 0°C no matter the amount of water or the size…

the core sediment samples were collected by using Plexiglas tubes in the mangrove forest and the tidal creek. Then, an 8 cm column of 65 Zn-spiked tidal water replaced the water column overlaying the core sediment sample. In order to maintain an oxygen-saturated condition with respect to the condition of oxygenated coastal water (Petersen et al. 1998), moist air was pumped overlaying the water column. The experiment apparatus shows as below (Fig. 2). The activities of 65 Zn in the water column…

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Once inside of the large bathroom, Jimin turns the tub on and waits until it's at a good temperature and doesn't scorch the hybrids skin, then lets it run until it's halfway filled. He turns to Jungkook, "Do you want me to leave while you wash up?" Jungkook's eyes widen, "No no! Don't leave," then he quiets down as a blush covers his cheeks, "M-Master always cleaned me. I don't like cleaning myself." A nod comes from Jimin's end, "Well then let's get you out of these gross clothes, okay…

correlation between different types of salt and the final height of ice cream formations. Background Information Milk is made up of triglycerides (mainly milkfat) dispersed throughout water as an oil-in-water emulsion, or dispersion of globules of one liquid into another. When agitated, the emulsion begins to break down, or coalesce, into fat and water. However, during this process, air is beaten into the emulsion, creating a foam (Rohrig, American Chemical Society). While the ice cream…

first used in Texas. These wells range from hundreds to thousands of feet deep (Source 3). Production wells may be drilled in the vertical direction only. But they can be paired with horizontal or directional sections (source 3). When the injected liquids pressure exceeds that of the rock, the fluids open or enlarge fractures that can extend several hundred feet away from the well (Source 3). After the fracturing is completed, the internal pressure of the geologic formation causes the injected…

Solubility Curves Lab Report Objective: To demonstrate how the solubility of a salt varies with temperature and plot the solubility curve of a salt on the basis of observed data. Introduction: Solubility is the maximum amount of substance that will dissolve at a specific temperature. The units for solubility are grams of solute/ 100 grams of solvent. A solute is the substance being dissolved. A solvent is present in greater amount. The solubility of a solute is defined as the amount of…

Lab two explored varies ways to find the density of objects. This lab used displacement , measurement, and the density formula to make observation and collect data about the balloon filled with sublimed dry ice, various water samples, and a golf ball. The ultimate goals of this experiment were to collect the most precise measurements of displacement of the balloon in the tap water, the weight of the three water samples versus the original cylinder, and diameter of the golf ball in order to use…