of Various Liquids and Solids The purpose of this experiment is to determine the weight (density) of certain liquids and solids in chemistry. These liquids include; Water‚ Hexane‚ Carbon Tetrachloride‚ and solids include; Copper‚ Zinc‚ Lead and‚ Aluminum. It’s important to know the weight of these products so you can properly conduct experiments and make clear observations. Different techniques will be used to determine these densities and one in particular is mixing the liquids in different
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fact that the matter can exist in three phases - - solid‚ liquid and gas. As the temperature of a pure substance is increased‚ it passes through these phases‚ making a transition at a specific temperature from solid to liquid (melting point--mp) and then at a higher temperature from liquid to gas (boiling point--bp). Distillation involves evaporating a liquid into a gas phase‚ then condensing the gas back into a liquid and collecting the liquid in a clean receiver. Substances that have a higher boiling
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agent or sulficant is concentrated sulfuric acid but‚ sulfurtrioxide‚ chlorosulfonic acid‚ metallic sulfates‚ and sulfamic acid are also occasionally used. The name sulficants comes from these molecules moving to the surface of a liquid or to an interface between two liquids and changing the properties of the surface. However‚ the nature and properties of sulfuric acid‚ makes it desirable to use it for nucleophilic substitutions whenever possible. For each substance being suflinated‚ there is a critical
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INTRODUCTION A mixture can simply be defined as a substance that is made up or consists of two or more elements and/or compounds that are physically combined but that have not reacted chemically to form new substances. A mixture may be a solid‚ liquid‚ gas‚ or some combination of those states. Mixtures can be found almost every wher in our everyday lifes and some common examples are * sand and water * salt and water * sugar and salt * Due to the fact that mixture are not chemically
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C hapter 1 MATTER IN IN OUR SURROUNDINGS As we look at our surroundings‚ we see a large variety of things with different shapes‚ sizes and textures. Everything in this universe is made up of material which scientists have named “matter”. The air we breathe‚ the food we eat‚ stones‚ clouds‚ stars‚ plants and animals‚ even a small drop of water or a particle of sand– each thing is matter. We can also see as we look around that all the things mentioned above occupy space‚ that is
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liquefaction (condensation) of a gas‚ which is the result of a number of molecules being pressed together to produce forces of attraction high enough to give a liquid structure. Cohesion in liquids is reflected in the surface tension caused by the unbalanced inward pull on the surface molecules‚ and also in the transformation of a liquid into a solid state when the molecules are brought sufficiently close together. Cohesion in solids depends on the pattern of distribution of atoms‚ molecules‚ and
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viscosity of a mixture of liquid Research Question The effect of hydrogen bonding on resisting flow of five different liquids Background Theory Viscosity is the resistance of a fluid to flow‚ either within itself‚ or to moving past an objects moving through it. A liquid with high viscosity is thick and flows slowly. A liquid with a low viscosity is thin and flows quickly. Different liquids have different viscosities. Factors‚ which affect viscosity of a liquid‚ are: Size of a molecule:
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faster than the diffusion in liquid phase due to the small spaces between the molecules that hinder other molecule movement. Other factors that will effect the diffusion are temperature‚ density‚ concentration and other external factors. 1. INTRODUCTION This experiment has been designed for students experiment on the technique of determining diffusivity of the vapor of a volatile liquid based on the established Winkelmann’s method. In this method the volatile liquid is allowed to evaporate in a
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examine 2 different types of liquid body armour. Liquid body armour is protective clothing with liquid chemicals designed to strengthen it to absorb and/or deflect slashing‚ stabbing and penetrating attacks by weapons. The poster will discuss two different liquid used to strengthen kevlar (modern armour material). The first is a colloid of silicon dioxide particles suspended in polyethylene oxide. this liquid is a Shear thickening fluid which hardens on impact. the second liquid used is a magnetorheological
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cooling at aircraft cabin and also to rremove heat from electrical and electronic equipment. Its work on principle of cooling based on ability of refrigent to absorb heat when changing from liquid to gas. Once it turns to gas all the latent heat of vaporization it is compressed and condensed back into its liquid state. In other way vapour cycle system his also help to reduced the humidity of the air entering the cabin while aircraft on the ground and as the temperature of the air is reduced the moisture
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