QUINTANA Date performed: NOV. 12‚ 2012 Section: C-1L Date submitted: NOV. 21‚ 2012 Group Number: 3 Exercise No. 2 COLLIGATIVE PROPERTIES (Full Report) I. INTRODUCTION Colligative properties In liquid solutions‚ particles are close together and the solute molecules or ions disrupt intermolecular forces between the solvent molecules‚ causing changes in those properties of the solvent that depend in intermolecular attraction. For example‚ the freezing
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DETERMINATION OF BOILING POINTS Introduction: The boiling point of a compound is the temperature at which it changes from a liquid to a gas. This is a physical property often used to identify substances or to check the purity of the compound. It is difficult‚ though‚ to find a boiling point. Usually‚ chemists can only obtain a boiling range of a 2 - 3oC accuracy. This is usually sufficient for most uses of the boiling point. Purpose: The purpose of this experiment is to determine the
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5.5 Candy Chromatography Background Information: Paper Chromatography is a separation tool in which pigment is put on a paper made of cellulose and water‚ and placed in a solvent‚ in this case isopropyl alcohol. Due to capillary action‚ the solvent crawls up the paper‚ separating the pigments. This technique is used to identify components of a mixture‚ even unknown ones‚ and can be used to isolate components into pure samples. Real world uses of this technique includes identifying certain biomolecules
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compounds conduct electricity as: (3 points) Link: http://antoine.frostburg.edu/chem/senese/101/compounds/faq/print-properties-ionic-vs-covalent.shtml Solids? No Liquids? Yes Aqueous solutions (when the ionic compounds are dissolved in water)? Yes Do covalent compounds conduct electricity as: (3 points) Solids? no Liquids? No Aqueous solutions (when the covalent compounds are dissolved in water)? No Substance Melting
Free Ionic bond Chemical bond Covalent bond
THE OSMOREGULATORY ABILITY IN PHASCOLOSOMA LURCA AND UCA COARCTATA Abstract Phascolosoma lurca (P. lurca) and Uca coarctata (U. coarctata) species and their organs were examined and studied to determine their osmoregulatory ability using the density of extracellular fluid (ECF) as a measure of ionic and osmotic concentration. Body fluids are denser than water which has a specific gravity of 1‚ plus solutes. Through the examination of the two organisms‚ P. lurca is an osmoconformer and U. coactarta
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retaining walls‚ earth dams‚ and airport‚ require man-placed soils‚ or fills. These soils are loose (weak) and must be compacted to increase their strength characteristics. • Soil compaction is defined as the method of mechanically increasing the density of soil by reducing volume of air. 2 General Principles • The densification is accomplished by pressing the soil particles together into a close state of contact with air being expelled from the soil mass in the process‚ thereby increasing
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equal volume of water and alcohol (ethanol in this case) on a balance‚ the water will be heavier than the ethanol. At room temperature and standard pressure‚ the family of alcohol (methanol and ethanol) have densities of about 0.79g/cc compare to water at the same conditions with a density of 1.0g/cc. This is because of the arrangement of its molecules. The molecules of water are closely packed than that of alcohol‚ which affects its weight. With this information‚ it is easy to conclude that alcohol
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“Salt”. DO not add anything to the third cup. Mark that cup “Control.” Cover the three cups and store them in a warm place. 3. Observe the cups after two‚ three‚ and four days. Compare how clear the liquid is in different cups. 4. Which cup has the clearest liquid? Which cup has the cloudiest liquid? Record
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pressure transmitted out to the surface or envelope of the liquid‚ but within the fluid itself the particlesare all pressed together. When a solid is immersed in the liquid it is pressed at every point of its surface in the direction perpendicular to the surface at that point.(3) In every horizontal layer throughout the liquid the pressure per unit area is the same; and this is the case independently of the shape of any vessel in which the liquid may be contained. The pressure per unit area in any horizontal
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This is defined as a substance dispersed evenly throughout another substance. A colloid consists of two phases in its entire substantial form which are a dispersed phase of the solution and a continuous phase. A colloidal system may be solid‚ liquid or gaseous in form. Some colloids are translucent which causes particles to be scattered throughout the colloid‚ whilst other colloids may be opaque or have a slight color. PROPERTIES (Particle Visibility‚ Particle Distribution‚ Filterability
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