then recrystallize the solute out of the cooled solvent. The formation of concentrated‚ pure crystals is possible in this recrystallization process if the appropriate cooling rate is applied to the solute and solvent mixture. Consequently‚ a purified‚ solid compound would be produced. Recrystallization involves dissolution of a solid in a solvent at elevated temperatures and the reformation of the crystals as the solution cools‚ allowing for impurities to remain in the solution. Once a solid has been
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to absorb liquids. It doesn’t matter if the sponge is from the sea‚ or from a factory‚ they both use wicking and surface tension in order to absorb sponges. This use is what allowed the sponge to soak its way into history. Sponge absorption is the key power that utilizes wicking and surface tension to soak up liquids. Wicking‚ or capillary action‚ allows water to be stored in sponges when they soak up liquids. According to World Book Student‚ capillary action is the movement of liquid in tiny holes
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solution C ABSTRACT Liquid C and solid C were both extracted from unknown solution by first using chemically active liquid-liquid extract‚ followed by vacuum filtration. Liquid C and solid C were then purified with the use of simple distillation and recrystallization respectively. Through the process of recrystallization‚ the percentage purity of solid C was found to be 6.01%. The melting point range of purified solid C was 117.0 – 119.0C while the boiling point of liquid C was found to be 117C
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into water? Water is actually made up of lots of tiny particles. These tiny particles move around in water when it is in its liquid form‚ but as the temperature gets lower these particles slow down and hardly move. When it gets cold enough they stick together and then what was once a liquid has now became a solid we all know as ice. Ice turns into water‚ back to a liquid‚ when the temperature of the ice cube is rising which cause the particles in the ice to move faster and is the converted into
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The article “The Multiple Truths about Crystal Meth among Young People Entrenched in an Urban Drug Scene: A Longitudinal Ethnographic Investigation” by Dayna Fast‚ Thomas Kerr‚ Evan Wood‚ and Will Small highlight the escalation of drug use among youth. The study goes to recognize the rapid growth of meth abuse among youth in affiliation to the social context of individuals. Like any drug there are risks of social and health-related infliction associated with meth use‚ and are often considered by
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it can be classified by its color. Another method is the streak test which is the color of the mineral in its powered form this is the true color of a mineral specimen as it lessens the impurity impact and eliminates the light distortion from the crystal. The luster test refers to the absorption‚ refection‚ or refraction of light by the surface of a mineral. The fluorescence test in ultraviolet light‚ some mineral specimens appear to Florence due to the fluorescent mineral impurities or due to locality
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language that is studied by the highest percentage of European students‚ 60‚3%‚ with French at only 30‚4%‚ German at 5‚2 % and Spanish at 3.5%. A question that many people are asking is: why has English become the global language of today? David Crystal‚ a famous linguist‚ said: "It [English] is a language which has repeatedly found itself in the right place at the right time". This means that the reason for this dominance can probably be found in the history og the English-speaking countries‚ and
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change of state. As you know‚ matter exists in three states (or maybe four‚ the fourth being a plasma)‚ solid‚ liquid and gaseous. At different temperatures‚ the same substance may be in different states. Each state is characterized by the way the interatomic forces act. In solids‚ the atoms (or molecules) are held firmly together in a closely packed crystal structure. In liquids‚ the crystal has fallen apart rendering the substance shapeless. Nevertheless a liquidhas certain coherence‚ being held together
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Sugar‚ or Pepper)? Background Information Water can be found as a liquid‚ solid‚ or gas. Water is made up of tiny particles which are hard to see in solids. A solid is matter that has a shape and usually takes up space. Its particles are closely packed together. The particles have some energy. They move back and forth‚ but they do not change places with each other. These tiny particles move around when water is in its liquid form‚ but as the temperature gets colder; they slow down and move less
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conical vial and was mixed with 2ml of methanol then shaken and let to sit till the undissolved particles settled to the bottom and transferred the liquid into a centrifuge tube using a filter-tip pipet. Repeating the process with an additional 2mL of methanol. The solvent was then centrifuged for 3 minutes until the mixture had settled into a supernatant liquid layer and a solid layer. Then in a prepared alumina column with 0.5 mL g of alumina 2mL of methanol was added to column and then the solution
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