Scientific Paper on Diffusion 2 ABSTRACT The effect of molecular weight on the rate of diffusion was assessed using two tests: the glass tube test and the agar-water gel test. In the glass tube set-up‚ two cotton plugs soaked in two different substances (HCl and NH4OH) were inserted into the two ends of the glass tube. The substance with the lighter molecular weight value (NH4OH‚ M = 35.0459 g/mole) diffused at a faster rate (dAve = 25.8cm)‚ resulting in the formation of a white ring around the
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"Diffusion - How atoms move through solids" Diffusion means mass transport by atomic motion. The mechanisms of Gases & Liquids is known as random (Brownian) motion and for solids is known vacancy diffusion or interstitial diffusion. Simply we can define diffusion as‚ the movement of particles in a solid from an area of high concentration to an area of low concentration‚ resulting in the uniform distribution of the substance. (Diffusion chapter 5‚ 2008‚ p.1) Ronald D. Kriz(1999) suggests that
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Mesopotamia means “The land of rivers” in Greek. This civilization started around 6000 B.C. Mesopotamia is in the area of the Tigris and Euphrates river system and is part of modern day Iraq‚ north eastern Syria‚ Southwestern Turkey‚ and smaller parts of Southwester Iran. The two rivers Tigris and Euphrates had a massive effect on this civilization‚ the people could farm easily because of the rich soil known as the Fertile Crescent which was the cause of the two rivers. Mesopotamia is considered
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MESOPOTAMIA EDUCATION Sumerians trained boys in art. The students were mostly sons from upper-class families – sons of priests‚ temple and palace officials‚ military officers‚ sea captains and scribes. Girls and those who can’t afford the fees were not enrolled. They used clay tablets to write and practice their cuneiform writing. Clay tablets became their books. Those who learned the art were assigned to work as scribes in the temples‚ courts‚ or as merchants. RELIGION Sumerians worshipped
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The Effect of Molecular Weight and Time on the Diffusion Rate of Potassium Permanganate‚ Potassium Dichromate‚ and Methylene Blue.1 Arantxa Alex Carpio Group 1 Sec. X – 4L March 24‚ 2015 ABSTRACT The effect of molecular weight and time on the rate of diffusion was determined using the agar-water gel test. A petri dish of agar-water gel with three wells was prepared and a prepared solution of each substance was dropped on each well; one with potassium permanganate (KMnO4)‚
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Egypt and Turkey Both Egypt and Turkey are known as having a long history with ancient cultural practise and architectural achievements such as pyramid which works of ancient Egyptian. However‚ there are similarities and differences in many sites such as climate‚ geographical and food. First of all‚ both Egypt and Turkey have a hot temperate and dry summer. While Egypt has moderate winters‚ Turkey has wet winters and the harsher in interior. For example‚ Ankara‚ which is capital of Turkey‚ has
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Biology 107 Section 1 11/4/13 Diffusion & Osmosis Introduction The purpose in this experiment was to estimate the osmolarity of potato tuber and celery cells by change of weight.Pieces of potato tuber and celery would be incubated in different sucrose solutions to find out the molarity at which weight of potato and celery tissues do not change. My hypothesis was that the Table 1: Group Data for Experiment:Estimating Osmolarity by Change in Weight Table
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Diffusion Introduction Diffusion is the net movement of ions or molecules from a region of high concentration to a region of low along the concentration gradient until equilibrium has been reached. The steeper the gradient the faster the rate of diffusion. There are a few types of diffusion. Three (3) of those are: Facilitated Diffusion- refers to diffusion of substances across a cell membrane with the help of transport protein. Dialysis- refers to the diffusion of solutes across a semipermeable
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The relationship between shape and diffusion rate Aim- To investigate the relationship between the shape of an object and the time taken for a substance to diffuse to its centre. Hypotheses- Part A) The 5x5x2.5mm block will turn clear first as the Surface area to volume ratio is high and the 10x10x10mm block will take the longest to completely diffuse the Acid to its centre. Part B) The flat‚ rectangular block will be the first to completely turn clear due to its high Surface Area/Volume Ratio
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The ancient cultures of Mesopotamia and Egypt developed into successful civilizations because they effectively utilized their surroundings. Rivers being the main geographic feature that led to successful development. From there on they went on to make many innovations to their traditional technology and techniques. These ancient cultures were also able to develop effective ways of governing their civilizations. Religion through cultural diffusion‚ brought together the city-states and empires created
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