Essays Tagged: "Crystal"

Basic concepts and example in entropy (physical chemistry)

tropy: (An Reaction which absorbed energy and result formation of more order substances/compounds)Recrystalistaion:In order to dissolved the crystals in the solvent, energy is required to be put into ... to system in the form of heat, (increasing the kinetic energy of the system to dissolved the impure crystals .As the kinetic energy of the system increased,( the molecules within the solvent absorbed ...

(3 pages) 70 0 4.4 Apr/2002

Subjects: Science Essays > Chemistry

The Classification and Formation of Crystals

IntroductionPurposeMy purpose of this experiment is to find out how crystals are formed and how they are classified. For a long time, I've been interested in crystals, ... ong time, I've been interested in crystals, so I've decided this experiment would be perfect for me!CrystallographyThe study of the growth, shape, and geometric characteristics of crystals is called c ... ls is called crystallography. When the conditions are right, each chemical element and compound can crystallize in a definite and characteristic form.Thirty-two classes of crystals are theoretically p ...

(2 pages) 41 0 3.0 Jan/1997

Subjects: Science Essays > Chemistry

The Crystal - story with a moral

The CrystalWhen I was a little girl, I was given a beautifully cut crystal that was long shaped and coul ... girl, I was given a beautifully cut crystal that was long shaped and could stand up by itself. The crystal was my childhood treasure. The spectrum of colours it produced made me imagine that it was s ... the bookshelf and would play with it after school. My parents were amazed by my fascination of the crystal. What fun was a piece of crystal? Shouldn't she be more interested with her dolls or play se ...

(5 pages) 26 0 2.3 Oct/2004

Subjects: Literature Research Papers > Creative Writing

Lab Report: Determining Percent Yield in a Chemical Reaction

ulfate (CuSO4) and Iron (Fe).Materials:Balance100-mL beaker250-mL beakerBunsen burnerCopper sulfate crystalsGlass stirring rod100-mL graduated cylinderIron filingsRing stand and ringWire gauzeProcedur ... nd ringWire gauzeProcedure:1. Record mass of clean 100-mL beaker.2. Add 8.0 grams of copper sulfate crystals to beaker.3. Add 50.0 milliliters of distilled water to the crystals.4. Put wire gauze on r ...

(1 pages) 37 1 2.5 Jan/2006

Subjects: Science Essays > Chemistry

Recrystallization

e:1. To determine the percent recovery from recrytalisation2. To determine the melting point of the crystals formed3. To purify a solid by recrystalisation.Apparatus:- Erlenmeyer flask- Filter paper- ... ed from the hot plate and allowed to cool.After 15 minutes, the flask was cooled in an ice bath.The crystals formed were collected by suction filtration using Buchner funnel.A wet filter paper was fit ...

(5 pages) 46 0 4.2 Mar/2006

Subjects: Science Essays > Chemistry

All About Louis Pasteur

on polarized light. Under a microscope in 1848, he discovered that there were two types of tartrate crystals which were mirror images of each other. This contradicted Mitscherlich who had observed onl ... mirror images of each other. This contradicted Mitscherlich who had observed only a single type of crystal. It was later found that Pasteur had serendipitously prepared his crystals in a particular w ...

(2 pages) 24 0 2.0 Mar/2006

Subjects: Science Essays > Chemistry

Three Super Things I learned from SuperMan

What she did was simple but she was able to save millions because of that. Had she not thrown those crystals, Luthor would have been able to retaliate to superman. She has followed her heart but has a ... close to us. We influence many people and many people inluence us. Luthor was able to replicate the crystal because he knew that crystals have the characteristics of the original crystals where it was ...

(2 pages) 23 0 3.0 Jul/2006

Subjects: Art Essays > Film & TV Studies > Film Review and Analysis

Melting point lab

Melting Points and Re-crystallizingPurpose:The purpose of this experiment is to select a suitable recrystallizing solvent, ... crystallizing solvent, to be able to purify and separate acetanilide from a mixture by process of recrystallization. Organic compounds that are synthesized in labs or isolated from natural recourses o ... are synthesized in labs or isolated from natural recourses often have been tainted by impurities. Recrystallization is a process that removes these impurities from solid organic compounds that are at ...

(5 pages) 29 0 0.0 Feb/2007

Subjects: Science Essays > Chemistry

An Hour To Kill

nd a friend. An Hour To Kill is a true story about the brutal rape and murder of seventeen-year-old Crystal Faye Todd.Hudson and Hill made this book by piecing together information from numerous testi ... se to what was exactly said as they possibly could. Although the book was centered on the murder of Crystal Todd, there were many people who played important roles in the investigation and story itsel ...

(3 pages) 1009 0 5.0 Aug/2001

Subjects: Literature Research Papers

History

Crystal Lab Purpose: To determine the effect of cooling rate on crystal size.Background Information: ... ooling rate on crystal size.Background Information: In this lab I will be discussing the process of crystal formation. The Lab tied into our topic because we were learning about intrusive and extrusiv ... ur topic because we were learning about intrusive and extrusive igneous rocks and how the minerals "Crystals" are formed. Intrusive rock is an igneous rock that is formed below the surface of th ...

(1 pages) 386 0 0.0 Aug/2001

Subjects: Science Essays > Chemistry

Diffusion of potassium permanganate crystals in water

Aim:To discover what factors affect the rate of diffusion of potassium permanganate crystals in water.Statement:What will happen? How will room temperate solutions or heated solutions ... w will room temperate solutions or heated solutions increase the rate of diffusion of the potassium crystals?Hypothesis:Heat will speed up the process of diffusion because heat will give out energy th ... ble to speed up the process of spreading the potassium molecules.Materials:WaterVinegarPermanganate crystalsBunsen Burner IceGlass beakersSoapy waterProcedure:1.Add water to one beaker. Keep at room t ...

(1 pages) 17 0 4.0 Oct/2007

Subjects: Science Essays > Chemistry

The spread of English in a Global World

it - has a share in it might be more accurate - and has the right to use it in the way they want' (Crystal, p.2).A letter to the Editor of New York Times states 'English, of all languages, does not b ... elop their own ways of speaking, this includes grammar, structure and pronunciation.Professor David Crystal (2003) agrees with this position. He says that the native speakers of English do not have th ...

(9 pages) 55 0 0.0 Nov/2007

Subjects: Social Science Essays > Communication Studies > The Media

Cats cradle 3

ikker. At this point, Jonah discovers the existence of a substance called ice-nine, a special water crystal that freezes at about one-hundred and twenty degrees Fahrenheit. This crystal would change t ... one-hundred and twenty degrees Fahrenheit. This crystal would change the way all the water on earth crystallized, ultimately destroying everything. Felix Hoenikker had developed the crystal and ...

(1 pages) 345 0 0.0 Feb/2008

Subjects: Humanities Essays > Religion & Faith > Christianity

Portable DVD Players

htweight aluminum metal alloy. Typically the shell is a metallic silver color.LCD Screen (5) Liquid Crystal Display (LCD) is a digital display technology that produces images on a flat surface by shin ... a digital display technology that produces images on a flat surface by shining light through liquid crystals and colored filters. Two of the benefits of this technology are: · Takes up less spa ...

(11 pages) 12 0 1.0 Feb/2008

Subjects: Science Essays > Chemistry

Determining the Number of Moles of Water of Crystallization Associated With One Mole of Copper (II) Sulfate in a Hydrate CuSO4 * xH2O (s).

INTRODUCTION Many salts that have been crystallized from water solutions appear to be perfectly dry, yet when heated they discharge large q ... salt is used in the described experiment. RESEARCH QUESTIONWhat is the number of moles of water of crystallization associated with one mole of copper (II) sulfate, in the hydrate CuSO4 * xH2O (s)? Th ... rmal treatment ( heating and cooling) and the dependent variable is the number of moles of water of crystallization. A number of other variables can affect the final result of the experiment: whether ...

(7 pages) 19 0 5.0 Jan/2009

Subjects: Science Essays > Chemistry

Angel above me

r I went to Florida to stay with oldest sister Cindee and her husband. During that summer my sister Crystal was awaiting the arrival of my niece. I started to become closer to Cindee, who helped me re ... s with the people close to you. I went home that July with the drive to repair my relationship with Crystal just in time for her baby shower. Spending time with Crystal at her shower meant so much to ...

(4 pages) 0 0 0.0 Oct/2013

Subjects: Art Essays

Drugs

r heroin carry serious health risks. Marijuana is the most commonly used illegal drug in the world. Crystal meth is used by individuals of all ages but is most commonly used as a "club drug", taken wh ... woman who smokes marijuana or hashish may give birth prematurely to an undersized, underweight baby.Crystal meth is used by individuals of all ages. Meth is a white crystalline drug that people take b ...

(4 pages) 0 0 0.0 Jul/2014

Subjects: Science Essays > Mental Health

The Natural World

this crestfallen evening would be the creator of a precious memory between man and his best friend? Crystal flakes began falling from the dismal sky, turning the terra into a wintry elegance. Along it ... und him pouncing up and down, leaping in the air, desperately trying to catch one of the mysterious crystals. "Someone is certainly enjoying his walk," said the man. 1Moments like these are one of l ...

(2 pages) 2 0 0.0 Oct/2014

Subjects: Art Essays