| Chemistry Lab Report | Constructing Heating/Cooling Curve | | Salman Ishaq 12-E | 1/27/2013 | | BACKGROUND As energy flows from a liquid‚ its temperature drops. The entropy‚ or random ordering of its particles‚ also decreases until a specific ordering of the particles results in a phase change to a solid. If energy is being released or absorbed by a substance remaining at the same temperature‚ this is evidence that a dramatic change in entropy‚ such as a phase change‚ is occurring. Because
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potatoes to the blender with 250 mls of tap water to cover the potatoes and blend on high until the potatoes are pureed (blended to a thick liquid or paste) - place a cheesecloth over a container and use the cheesecloth to obtain the liquid portion (only) of your potato puree. You can squeeze the cheesecloth in the end to obtain the final portions of the liquid from the puree. - Make a 1% sucrose solution using the method describe in your osmosis lab. - Make a 1% salt solution by measuring 1 gram
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Effects of Salt on Ice Bill Yongco Angela Enriquez Trisha Co Ying Huang Xu Abstract To be done when IP is completed Acknowledgments To be done when IP is completed Table of Contents Background of the Study | Pg.3 | Statement of the Problem | Pg.3 | Significance of the Study | Pg.3 | Scope and Limitations | Pg.4 | Review of Related Literature | Pg.4-5 | Methodology | Pg.6 | Results and discussion | Pg.7-8 | Conclusions | Pg.9 | Recommendation | Pg. 9 | Definition
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melting points were 111.2˚C and 109.8˚C when each compound was mixed with the unknown. Therefore‚ the unknown #10 was dibenzoyl ethylene. Introduction The melting point is defined as the temperature at which the solid is in equilibrium with its liquid‚ and this characteristic is very unique‚ so a substance can be determined by the melting point. Determination of the melting point is very important technique in many areas of chemistry especially‚ in organic chemistry area because the melting point
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until it softened. We then clamped on end of each dialysis tube. After this was done we filled each dialysis tube with 10 mL of a specific concentration of liquid and then clamped the other end. One with tap water‚ one with 20% sucrose‚ one with 40% sucrose‚ one with 60% sucrose and another with tap water. We then filled up the beakers with the liquid required‚ just enough so that it would cover the dialysis tubes when put in there. Beakers 1 through 4 were filled with tap water‚ while beaker 5 was filled
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children understand that temperature can affect the state of a substance as it showed that the water was liquid in room temperature but turned to solid ice in the colder temperature of the freezer which is important when following the national curriculum for science as it states that children should be taught to ’compare and group materials together‚ according to whether they are solids‚ liquids or gases and to observe that some materials change state when they are heated or cooled‚ and measure or
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Research: The word density means the degree of compactness of a substance. There is density in everything in your everyday life (matter.)The formula to find density is d=m/v.The density of solids and liquids is usually stated as g/cm3‚ while gases are usually stated as kg/m3. A real life example of density would be that ice floats on water because it is less dense than water‚ or it sinks because it is more dense than water. The only substance that breaks this rule is ice. Archimedes was
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sound to each other and the faster sound can travel. It is easier for sound waves to go through solids than through liquids because the molecules are closer together and more tightly bonded in solids. Similarly‚ it is harder for sound to pass through gases than through liquids‚ because gaseous molecules are farther apart. The speed of sound is faster in solid materials and slower in liquids or gases. Elastic property- It relates to the tendency of a material to maintain its shape and not deform when
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that it uses a moving gas phase and a stationary liquid phase‚ and that the temperature of the gas system can be controlled. In a gas chromatograph the sample is shot in with a syringe and is immediately vaporized in a heated injection chamber. It is then introduced to a moving stream of gas called the carrier gas which sweeps the vaporized sample into a column filled with particles filled with liquid adsorbent. This column is usually filled with liquid that has a low vapor pressure and high boiling
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Chemical Engineering Practices Submitted: 1st October 2013 Supervisor: Mr Ayman William 1.0 Abstract /summary The purpose of this experiment to carry out in the lab is because to determined the capability to water droplet to carry out the liquid-liquid extraction. The studies is to determine the average time travel for each of the 10 out of 50 water droplets from top of the burette and to the bottom‚ the average volume of each of the water droplet and the volume of NaOH needed to neutralise the
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