... of the substance electrons are negative protons are positive neutrons are neutral an atom's nucleus may contain neutrons or protons (no electrons) water is a compound a bond with unequal electron sharing is polar Lesson Highlight: Topic 1 - The Scientific Method The Scientific Method Science is based on three principles. These principles establish the framework and limits of science. And ... large sample is usually better than a small sample. Learning Object Info: Lesson Highlight: Topic 1 - The Scientific Method   Type: HTML   Submitted By: Randall Warwick   Lesson Highlight: Top...

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... up the sodium chloride (NaCl) for 5 minutes and discovered that nothing happened to it. Discussion Sodium chloride contains two charged particles, Na+ and Cl-. Cl- is missing one electron to get 8 electrons in its outer shell, and Na+ has one electron too much to reach its goals of 8 electrons. This creates an electrostatic attraction between the two particles, and Na+ gets an ... electron from Cl-. These ions will stay together by the electrostatic attraction because they are oppositely charged. This is called an ionic bonding, and in this case it is called NaCl. ... substance. As ex...

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... folds towards the more substituted carbon. Objective and Materials: The materials for this experiment is listed on page 87-92(Organic Chemistry laboratory Manual, Haden/McNeil, 2003-04) Procedure: The procedure for this experiment is listed on page 87-92 (Organic Chemistry laboratory Manual, Haden/McNeil, 2003-04) Data: All data is in laboratory notebook Calculations: The following is a calculation for ... double bond starts to form and the Br starts to leave. 2) Neutral alkene is produced when the C-H bond is fully broken and the Br has departed with the C-Br bond electron pair. Dehyd...

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... intermolecular forces : - Van Der Waals' Forces : a temporary dipole that occurs in a molecule, attracting another molecule of the same compound to itself, due to one of the molecules having an electron repel the electron in the other molecule, creating a positive-negative pole and attraction. These forces are the weakest of the three. - Permanent Dipole Forces : polar molecules causing induced attraction due to the ... atoms have a free pair of electrons. Ten times stronger than Van der Waals' forces, they occur when the electron density changes around the atoms : the electronegative a...

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... had the brewer putting the grain in the pot and bringing it to a boil before removal. That method often resulted in tannin extraction. Water chemistry also plays a role in tannin extraction. Steeping the heavily roasted malts in very soft water will produce conditions that are too acidic and harsh flavors ... above each range. 14.2 The Acid Rest and Modification Before the turn of the (last) century, when the interaction of malt and water chemistry was not well understood, brewers in Pilsen used the temperature range of 86-126F to help the enzyme phytase acidify their mash when using on...

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... : - Volume of HCl 2 mol per dm3(cm3) Volume of Na2S2O3 0.161 mol per dm3(cm3) Volume of H2O(cm3) Time taken(s) A 6 24 0 29 B 6 4 20 152 Biography of books I have used Chemistry text book Chemistry Explained by J.R. Palmer and B.A.J. Shaw Heinemann advanced science Chemistry by Ann and Patrick Fullick Revision guide for double award ... ...

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... used for an immeasurable number of things. There are many properties of water, which makes this molecule so unique. One which people overlook is hardness. Hardness is defined in the Chemistry: The Central Science by Prentice Hall's as being "water that contains a relatively high concentration of Ca2+, Mg2+, and other divalent cations." Water containing these ions is not a health hazard; however ... this new hypothesis: water from the tap in a residential area is less hard then areas farther away from the water purifying company. References 1. Brown, Theodore L., H. Eugene LeMay Jr., Bru...

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... shown the Cr-Cr distance to be 2.3623. The quadruple M-M interaction is shown to actually be a strong interaction, which has strong implications implying that M-M bonds may be important in the chemistry of metals of the first transition series as well as for the heavier metals3. Chromium(II) acetate hydrate is a relatively stable chromium(II) compound, which rate of oxidation is relatively ... Niekerk, F.R.L. Schoenin and J.F. de Wet, Acta Crystallography., 6, 501 (1953). 2. F. A. Cotton, Rev. Pure Appl. Chem., 17, 25 (1967). 3. F.A. Cotton, B.G. DeBoer, M.D. LaPrade, J.R. Pipal, D.A. U...

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... : 3300K Heath of Fusion: 7.140 kJ/N Heat of Vaproization: 273.0 kJ/N Energies 1st Ionization: 529.6 kJ/N 2nd Ionization: 1035 kJ/N 3rd Ionization: 2130 kJ/N Heat Atomization: 328 kJ/N Electonegitivity: 1.14 Electron Affinity: 50 kJ/N Specific Heat: 0.19 J/gk Oxidation and Electrons Shells: 2" 18,22" 2 Electronic Configuration: (Xe) 4f(4)5S(2)5P(6)6S(2) Minimum Oxidation #: 0 Maximum Oxidation #: 3 Minimum Common Oxidation #: 0 Maximum Common Oxidation ... ...

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... syringe was then placed in a light. With the light, the leaves were able to photosynthesize and produce oxygen, making them float back to the top. In the second demonstration was electron transfer by chloroplasts. This was performed by testing the clarity of water in a spectrophometer. Three test tubes were created and had water, a chloroplast solution, phosphate buffer and one of the ... ...

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We were able to ignore the terms on the right side of the equation because we know mass is conserved within the reaction. Also the conservation of atoms tells us that the ratio of moles of copper chloride to aluminum is constant. So given the amount of copper chloride that reacted, we could find the amount of aluminum that reacted. If all the aluminum dissolved and the liquid was still blue, we would know that aluminum was the limiting reagent. We would also be able to calculate the mass of the original aluminum wire if we were able to measure the mass of the leftover copper. By finding the ma...

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... protects trees and plants by enabling them to receive more water and air due to the concretes porous material. As the rainfall is captured and released into the ground soil chemistry and biology treat the polluted water and naturally filter it to a near-potable level. The pervious concrete is also very helpful because it can increase groundwater and aquifer recharge. Its ... ...

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... cell and out of the cell. Diffusion is passive transport and is very essential process through which materials move from one place to another. It plays a significant role in biology, chemistry, physics, and in nearly every single part of our life. Diffusion is a result of the continuous thermal motion of atoms and particles and therefore goes from a high concentration gradient to ... ...

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Purpose The purpose of this lab was to measure the heat of solution through heating the two solutions Na2S2O3 and NaC2H3O2 that we used for solutes. Procedure Prepared the data table with five columns. Prepared a cold water-bath. A small plastic water-tub with ice was filled in. Fill a 600mL beaker three-fourths full of distilled water. Made a hole in the ice large enough for the beaker.Cut a square of corrugated cardboard slightly larger than the top of the plastic foam cup.Made a hole in the center of the cardboard piece with a cardboard throw a pencil. Make a second hole in the center. Inse...

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... conveyor belt. Wallace Broecker is the Newberry Professor of Earth and Environmental Sciences at Columbia University. He has taught at Columbia since 1959, and his research interests include paleoclimatology, ocean chemistry, isotope dating and environmental science. He conducts much of his research in Columbia University's Lamont Doherty Earth Observatory. Broecker has received many awards for his scientific work, including Arthur L. Day ... ...

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Post-Laboratory Questions 1. Trial 1 Trial 2 mass % of salt 32.08% mass % of salt 33.9% mass % of sand 18.61% mass % of sand 20.7% mass % of seashells 18.53% mass % of seashells 27.0% total mass % recovery 80.41% total mass % recovery 81.0% 2. a) If the beaker was heated too vigorously and solution splattered out, the mass percent of the NaCl (salt) would be less than the actual because some of it was lost when it splattered out of the beaker. b) If the recovered sand wasn't completely dry it would still contain some of the solution that was removed from it and would therefore cause a higher m...

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Chemistry Assessed Practical Aim- To determine the percentage content of water (H2O) in hydrated copper sulphate crystals (Cu (ÉÉ) SO4 . 5H2O). Equipment- Approximately 1 gram of copper sulphate crystals, evaporating dish, ... ...

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... holders can work in some applied research and product development positions, but usually only in certain subfields. Those preparing as crop or soil scientists take courses in plant pathology, soil chemistry,entomology, plant physiology, and biochemistry, among others. Advanced degree programs include classroom and fieldwork, laboratory research, and a thesis or dissertation based on independent research. Horticulturists who have advanced degrees usually ... ...

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... , northeastern North America and east and north Canada are places in North America where the is more sensitive to acid deposits then any other places. Many factors, including the soil chemistry and the type of rock determine the environment ability to neutralize the acid deposits from the rain. Soils naturally contain small amounts of poisonous minerals such as mercury, aluminum, and ... ...

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... statistics was used to compare final percents gained by the class compared to the actual percent sulfate ion in the experiment and errors in the experiment were determined. Introduction In chemistry there are different ways of figuring out what and how much of a certain substance there is in a mixture. In this experiment the main goal was to figure out how much ... ...

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... . A fuel cell provides a DC voltage that can be used to power motors, lights or any number of electrical appliances. There are several different types of fuel cells , each using a different chemistry. Fuel cells are usually classified by the type of electrolyte they use. Some types of fuel cells show promise for use in power generation plants. Other may be useful for ... ...

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Purpose The purpose of this experiment was twofold. The greater being, as implicated in the title, to become familiar with the scientific method. Meaning that with this experiment, greater knowledge about Laboratory tools, procedures as well as how to formulate and test a proper hypothesis will be learned. Also with this experiment, students will learn a great deal as to how Alka-Seltzer reacts in different mediums. Hypothesis After observing how Alka-Seltzer reacted in room temperature D.I. water, a variety of different hypothesis could be made as to how the Alka-Seltzer would react when the ...

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... soil will never be replaced. There is also a concern about the impact of acid rain on forest soils. There is good reason to believe that long-term changes in the chemistry of some sensitive soils may have already occurred as a result of acid rain. As the acid rain moves through the soil it can strip the soil of any vital nutrients ... ...

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