Essays Tagged: "ions"

A resistance Investigation

ving particle) will increase, I think this will happen because there are thousands of electrons and ions in the wire, when the voltage is applied, the negative electrons move through the wire whilst t ... wire, when the voltage is applied, the negative electrons move through the wire whilst the positive ions stay in the same position. The electrons are attracted to the positive end of the battery, the ...

(24 pages) 176 2 4.2 Apr/2002

Subjects: Science Essays > Physics

Basic concepts and example in entropy (physical chemistry)

her) within the crystal. The lattice will eventually be broken resulting in the crystal existing as ions within the solution. The impurity originally trapped within the crystal is separated from the c ... the crystal is separated from the crystal, (the crystal structure is now broken and exists as free ions within the solution)The impurity is then filtered off, then the crysta ions are now free to rec ...

(3 pages) 70 0 4.4 Apr/2002

Subjects: Science Essays > Chemistry

IB Chemistry - Intermolecular Bonding Essay:

nic with the nearest noble gas., the substance is held together by electrostatic forces between the ions. The tendency for these ions to be formed by elements is corespondent to the octet rule, when a ... hat they attain an outer shell containing eight electrons. The factors that effect the formation of ions are ionization energy, electron affinity, lattice energy.Figure 1The transfer of electrons invo ...

(6 pages) 89 0 4.3 Jan/1997

Subjects: Science Essays > Chemistry

Sequence of Chemical Reactions

Laboratory #8 The Sequence of Chemical ReactionsDrew SelfridgeDave Allen, Lab partnerInstructor YangFebruary 11, 1997INTRODUCTIONThis experiment ... his experiment was to recover the most amount of copper after it is subjected to a sequence of reactions. The copper is originally in solid form, but the reactions will turn it into free Cu+2 ions flo ... ginally in solid form, but the reactions will turn it into free Cu+2 ions floating in solution. The ions will then be regrouped to form solid copper once again. During this process, however, some of t ...

(2 pages) 39 0 4.4 Feb/1997

Subjects: Science Essays > Chemistry

Chem Lab, do ions combine in definite ratios.

LAB 3.Ø.Ø: do ions combine in definite ratiosPURPOSEThe purpose of this investigation is to determine whether ions ... ine whether ions combine in definite ratios or not. To observe, and create a table of the different ions.QUESTIONIf copper (II) sulfate when mixed with sodium carbonate at different quantities combine ... TIONIf copper (II) sulfate when mixed with sodium carbonate at different quantities combine to form ions in definite ratios.HYPOTHESIS / PREDICTIONI believe that the ions will combine in definite rati ...

(3 pages) 29 0 3.0 May/2003

Subjects: Science Essays > Chemistry

Political Campaigns.

idates for the offices of president and vice president. In each political campaign there are nominations and they are made at a national convention (an agreement between states for regulation of matte ... television, being the greatest expense As a result, parties and candidates need to raise many mill ions of dollars Financial contributions by corporations, labor unions and other organizations, indiv ...

(5 pages) 139 0 3.7 May/2003

Subjects: Law & Government Essays

Basic Facts About Iron.

up approximately 5 percent of the Earth's crust. Much of this iron is found in such small concentrations in other rocks, however, that it cannot be used economically for mining.The chemical element ir ... opertiesIron, like other metals, conducts heat and electricity; it has a luster, and forms positive ions in its chemical reactions. Pure iron is fairly soft and can easily be shaped and formed when ho ...

(3 pages) 43 0 3.0 Nov/2003

Subjects: Science Essays > Environmental Science

Understanding Neurons and Ion Channels within the Brain.

ons are not flowing properly there is an increased risk of disease and instability within the body. Ions within neurons also tend to move against membrane potentials, the difference between inside and ... potentials, the difference between inside and outside electrical charges of a cell. When Na+ and K+ ions move through respective channels, the balance of membrane potentials is dramatically changed as ...

(2 pages) 32 0 3.0 Dec/2003

Subjects: Social Science Essays > Psychology

Diabetes Types 1 and 2 thoroughly explained

e excess glucose. This excess glucose spills into the urine, accompanied by water and electrolytes (ions required by cells to regulate the electric charge and flow of water molecules across the cell m ... riety of disease throughout his or her lifetime, these symptoms can be minor symptoms such as infections which heal slowly or not at all, tiredness, numbness in the hands or feet, itching, excessive u ...

(5 pages) 193 0 3.0 Jan/2004

Subjects: Humanities Essays > Health & Medicine > Diseases

What are the Causes and Effects of Interactions Between the Solar Wind and Planetary Bodies?

llion tonnes is emitted each second. It is comprised of a hot plasma of free electrons and positive ions, atoms which have lost their electrons in the violent collisions at 1,000,000°K. Being a pl ... and prominences, and sends out large amounts at one time. The picture below shows mass coronal ejections from the sun.The time it takes to reach Earth has been recorded at roughly 4 days, by seeing ho ...

(12 pages) 33 0 2.6 Feb/2004

Subjects: Science Essays > Earth Sciences

Resistance in a wire- good essay.

must have a source of electrons. If they have a path to flow through, they will be attracted to the ions. Voltage is the difference in electrical potential between two points in a circuit. It's the pu ... s in the single wire. Due to this, there is more resistance in the single wire.ConclusionThe predictions that I had made in the hypothesis are proved correct. Regarding the first prediction, I had sai ...

(5 pages) 52 0 0.0 Feb/2004

Subjects: Science Essays > Physics

Plasma Telivision

Introduction:Science has played a major role in the life of humanity. With the inventions and discoveries man was able to lead a easy and comfortable life.Body:The basic idea of a plasm ... d blue - which are evenly distributed on the screen. By combining these colours in different proportions, the television can produce the entire colour spectrum. The central element in a fluorescent li ... r spectrum. The central element in a fluorescent light is a plasma, a gas made up of free - flowing ions and electrons.Most plasma displays don't have a television tuner. Plasma displays are just moni ...

(4 pages) 71 1 3.5 Mar/2004

Subjects: Science Essays > Technology

Ion channels

the maintenance of inorganic ion homeostasis within the cell by selectively importing and exporting ions across the plasma membrane. These proteins form a hydrophobic pore across the membrane to conne ... These external factors cause a change in the conformational shape of the channel truing the flow of ions on or off. A rapid influx of ions down their concentration gradient, through the open channel, ...

(6 pages) 42 0 0.0 Mar/2004

Subjects: Science Essays > Biology

Biology A level planning experiment of effect of lead ions on amylase

The effect of Lead ions on amylase activityAimWhat is the effect of Lead ions on the enzyme Amylase. And does it have a ... ed A to F add 1ml of 1% Amylase solution. In the remaining 6 test tubes add the different concentrations of the lead nitrate solution as shown below in their corresponding test tubes.All concentration ... .e. For all the starch to be reacted by the Amylase.Repeat this process for all the other concentrations with the test tubes and boiling tubes. Remembering to use a different pipette each time used fo ...

(6 pages) 34 0 2.5 Mar/2004

Subjects: Science Essays > Biology

Ksp study

er.When we use the solubility rules to predict whether or not a precipitate will form when two solutions are mixed it is more accurate to say that the precipitate may form rather than the precipitate ... rate to say that the precipitate may form rather than the precipitate will form because if the solutions were very dilute, a precipitate might not form. What concentrations of ions will give a precipi ...

(8 pages) 29 0 0.0 Mar/2004

Subjects: Science Essays > Chemistry

Biology Basics: Homeostasis

is1. What is diffusion? What is osmosis?Diffusion is the process by which substances spread from regions of high concentration to regions of low concentration. It is a method of passive transport, and ... ation. It is a method of passive transport, and thus costs the cell no energy. Electrically charged ions and large molecules will not diffuse freely across the membrane.Facilitated diffusion is used f ...

(2 pages) 63 0 4.6 Apr/2004

Subjects: Science Essays > Biology

A Day In My Life Using Chemistry: from a girl's point of view (could very easily be changed to a guy's.

o after going to the bathroom is brush my teeth. The toothpaste I use has a fluoride base. Flouride ions are what strengthens the enamel in my teeth and protects it against bacteria decay. Three kinds ...

(4 pages) 42 0 3.4 Apr/2004

Subjects: Science Essays

Review of Literature Conductivity Research Report

trical conductivity estimates the amount of total dissolved salts, or the total amount of dissolved ions in the water. EC is the abbreviation of electrical conductivity, and TDS is the abbreviation of ... rent (I) flows through the water due to this voltage and is equal to the concentration of dissolved ions in the water. The more ions, the more conductive the water is, resulting in a higher electrical ...

(6 pages) 59 0 5.0 Apr/2004

Subjects: Science Essays > Earth Sciences > Geology & Geosciences

The effect on Potato in Salt Solution. J de Salles

Potato in Salt SolutionScenarioPlants in the soil have their roots in a dilute solution of mineral ions. When they are s ... ed a solute, to form a solution.The water content of plants varies depending on environmental conditions. In land plants it plays a vital role in structural support and mineral transport and thus a la ... ion through a partially permeable membrane from areas of high water potential (low solute concentrations) to regions of low water potential (high solute concentrations).All plant cell membranes are pa ...

(6 pages) 44 0 4.0 Apr/2004

Subjects: Science Essays > Biology

Chemistry Coursework

We are going to vary the concentration of the Hydrochloric acid. The total volumes of the two solutions will remain constant therefore keeping the overall volume constant.Na2S2O3 + 2Hcl S + SO2 + 2Na ... tant.Na2S2O3 + 2Hcl S + SO2 + 2NaCl + H2OScientific KnowledgeParticles, such as molecules, atoms or ions, must collide before a chemical reaction can take place. This diagram shows this:So the increas ...

(6 pages) 42 1 2.7 Nov/2004

Subjects: Science Essays > Biology