... from the bottom to the top in the Halogen Family, where the top is the highest. In this experiment you will observe reactions of the Halogen family, and verify reactions of them. Purpose: Find similarities between all the elements in the Halogen family and which element is the most reactive. Materials: test tubes, 13x100-mm(4) pipet dropper test tube rack safety glasses .1 M solutions of: Hexanes NaF 3.0M NH3(aq) NaCl chlorine water NaBr ... observe and record observations. 5. Clean test tubes. 6. Repeat but instead of adding Ca(NO3)2, add AgNO3 to each solution. Part II 7. Add NaI, NaB...

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... . This reaction is called neutralization. In this process an aqueous solution is the combination of hydronium ions with hydroxide ions to form water. The process of determining the concentration of a solution is called standardization and is achieved by the procedure of titration. A specific volume of a solution reacts with a standard solution of another substance where the concentration is known. The concentration of the unknown solution can then be calculated. In this experiment, this reaction will be ... this experiment. The average percent of KHP in the unknown was 74.8 % and the sta...

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... titration (EDTA) is done by adding a collection of certain chemicals to the sample. One drop of the sample is placed in each individual well and is mixed with one drop of the chemical indicator, called eriochrome black T, also commonly known as EBT. A buffer solution composed of ammonia, ammonium chloride, and magnesium EDTA is added to each individual well. A red color appears in each individual well due to a chemical ... levels must match the energy of the light in order for the atoms jump to the next energy level. The AA spectrophotometer measures the abundance of ions in the water b...

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... placed in ice to cool. The precipitate is filtered and washed with 4 10mL portions of cold air-free water, then alcohol and ether, careful to not expose the crystals to air when wet with water or alcohol. The crystals are dried then IR absorption is taken. Results The crystals of chromium(II) acetate were brick red in color and had a mass of 1.250g. The crystals were very fine in ... texture, and easily were displaced by wind. The IR absorption spectrum is attached. Discussion Yield If the limiting factor of reactants was the 3.0g Chromium ... chloride (266.36 amu), the ideal yield woul...

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... person took a photo of the element. The 3rd person recorded the color of the element. All of this was recorded in the Gas Discharge Tube chart. To the actual spectra, everyone had to go on a website and copy and paste the element's spectra. The second part of the experiment was the flame test which was the most enjoyable part for many. First, everyone made sure there Bunsen burner was on and grabbed water-soaked wooden splints, wooden ... sticks. They dipped the stick in salt of the ... ...

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... It is extremely soluble in supercritical fluid carbon dioxide and somewhat soluble in water; aqueous solutions of caffeine quickly break down. Physical features: in solid form it is white in color and is prism-like crystals. It has no odor - it is odorless. Summary Of Article "Effect of Caffeine on Oxygen Consumption and Metabolic Rate in Very Low Birth Weight ... the caffeine, and the decrease of apneic episodes was significant. Review Of Article "Effect of Caffeine on Oxygen Consumption and Metabolic Rate in Very Low Birth Weight Infants with Idiopathic Apnea" In review of this article...

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... towel. Using the tongs, each side of the penny was placed in the flame of the burner for several seconds and then the penny was put back in the water. The above procedure was repeated with a second penny. However, the stand was moved closer to the burner so that the plating process occurred in ten minutes. Results The surface of the penny that was in contact with the zinc filings changed from light brown in color to silver ... in color. This "silver ... ...

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... know from previous experience that wood has the ability to burn, therefore since wood changes chemically when it burns, one of its chemical properties is its ability to burn. Water on the other hand does not burn so water does not have the chemical property of burning. Water does react violently when it is combined with sodium metal. Therefore, a chemical property of water is its ability to react with sodium ... metal. Physical properties are the properties of an object that can be observed. For example color, shape, and texture are all physical properties ... ...

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... the water. Record any observations of both the crystals and the water. 3. Stir the mixture with the glass rod until the crystals have completely dissolved. Record observations of the mixture. 4. Place thermometer is the mixture and write down current temperature. Then loosely crumble the foil and place into the mixture. Observe from the side for about 10 minutes and note any changes in the temperature. 5. When the reaction is complete, pour the liquid portion of the mixture into the sink. Discard the ... and Conclusion In this lab, we determined that there would be a chemical reaction b...

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... base. (While Yvette is demonstrating, write equations on the board and the color guide that determines if it is an acid, base, or neutral). Substances are: Acids Vinegar - an acidic acid CH3COOH Soda (coke) - acidic and carbonic acid (H2CO3) Neutrals Water - H20 Bases Clorox - NaOCl Ammonia - NH3 (weak base) Baking Soda/Water - Na2CO3 + H2O COLOR GUIDE (Included on Board) DEEP RED = STRONG ... base chemistry is important to us on a practical level as well, outside of laboratory chemical reactions. Our bodily functions, ranging from the microscopic transport of ions across nerve cell membr...

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... 2-3 ml of water. Mix and hold over flame until the water evaporates. Examine the residue and compare it to a fresh sample of NaCl. ! Place 5 drops of barium nitrate and 2-3 drops of sodium chromate. ! Place 5 drops of iron III chloride and add 1-3 drops of potassium thiocyanate. ! Place 5 drops of iron III chloride and add 1 or 2 drops of silver nitrate. ! Examine the nicrome wire test rod. Observe the color and the luster of the metal. Hold the wire in the flame of the burner ... for about two minutes. ! Using forceps, hold a piece of magnesium ribbon in the flame. ! Place ... ...

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... of water, tube 3 had 1.0ml of sucrase and 2.0ml of water, tube 4 had 1.5ml of sucrase and 1.5ml of water, and finally tube 5 had 3.0ml of sucrase and 0.0ml of water. Once all combined they sat at room temperature to allow the sucrase to act upon the sucrose. After 10 minutes 3.0ml of Benedict's solution was added to each test tube and placed in boiling water for 5 minutes. The color changes caused by the Benedict's solution showed the effects of the ... sucrase concentration. Page 2 B. The second experiment tested the ... ...

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... gases chemical change. The chemical change of substance and other compounds is used when your making the delightful treat of pudding. Chemical reactions are found in other ways but these are the most common occurrences. Chemical change results in the production of new substances. Two types of substances which are very important in everyday life are acids and bases. Acids are sour, water-soluble substances which ... they change so fast that they can react with skin and cause burns. Bases are bitter, water-soluble substances which are also very useful. Examples of bases are ammonia, baking...

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