evaporation when forming crystals. Phenolic compounds will undergo salt formation with sodium hydroxide solution‚ NaOH.Therefore‚sodium hydroxide solution is allow to use to extract a carboxylic acid or phenolic compound from its solution in an organic solvent.An organic solvent can be used to remove organic impurities from a carboxylic acid or phenol dissolved in aqueous sodium hydroxide.Aqueous solution of Sodium
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of chemistry that uses calculations to determine the quantities (masses‚ volumes) of reactants and products involved in chemical reactions. It is a very mathematical part of chemistry. In this experiment‚ you will react a known amount of sodium carbonate solution with a known amount of calcium chloride solution. The skeletal (unbalanced) equation for the resulting double replacement reaction is: Na2CO3(aq) + CaCl2(aq) Æ NaCl(aq) + CaCO3(s) Note that three of the chemicals have
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stoichiometry relationships‚ you will calculate a theoretical yield of CuO‚ and your actual yield. You then will calculate a percent yield. Copper(II) sulfate pentahydrate will be dissolved in water and reacted using a double replacement reaction with sodium hydroxide. The addition of hydroxide ions to a solution containing copper(II) ions results in the precipitation of copper(II) hydroxide. Subsequent heating of the copper(II) hydroxide results in decomposition to copper(II) oxide and water.
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Reactivity starting from the least reactive. Li‚ Na‚ K c) A piece of sodium was dropped in a trough containing water. i) Describe what you would see. Sodium melts almost at once to form a small ball that dashes around the surface. . If the sodium becomes trapped on the side of the container‚ the hydrogen may catch fire to burn with an orange flame ii) Write a word and symbol equation for the reaction. sodium + water → sodium hydroxide + hydrogen 2Na + 2H2O → 2NaOH + H2 iii) what would be the
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Performed: 02/05/2013 Submitted: 02/06/2013 Section 1: Title Physical and Chemical Properties Section 2: Purpose This labs is intended to help me investigate chemical and physical properties of pure substances. Section 3: Procedure In this experiment‚ I observed substances in their natural state‚ and recorded their apparent physical properties. I then tested the substances to determine how they react when their natural environments were altered. The pure substances were tested to see
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Description Fixed Charge Metal* + a Nonmetal Rule: Full name of the metal + Stem on the nonmetal + the suffix “ide” Formula Name NaCl Sodium chloride CsF Cesium fluoride CaBr2 Calcium bromide MgO Magnesium oxide Li2S Lithium sulfide Al2O3 Aluminum oxide ZnH2 Zinc hydride AgI Silver iodide SrS Strontium sulfide Ca3N2 Calcium nitride K2Te Potassium telluride Na3N Sodium nitride CaC2 Calcium carbide LiH Lithium hydride Mg3P2 Magnesium phosphide Memorize your fixed charge metals!!!! Group 1A‚ 2A‚3A
Free Oxide Oxygen Ion
REAGENTS: R1: - 0.9% sodium chloride solution. R2:- Diazo reagent Diazo reagent: - 7ml of sulphanilic acid + 1ml of sodium nitrite PROCEDURE The test tubes were labelled blank‚ sample and standard. 250µl of R2 and 2ml of R1 was pipetted into the test tubes labelled sample and standard while only the R1 and 200µl of sample
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1. Standarization of NaOH with Potassium Hydrogenphthalate (KHC8H404) The hygroscopic nature of NaOH requires its solution to be standardized with a stable primary standard such as potassium hydrogen phthalate. The exact molar concentration of NaOH solution can then be accurately determined. 1.1) Prepare the stock NaOH solution by dissolving about 4 g of NaOH pellet in 100 mL of deionized water. Note that NaOH is a hazardous chemical which is corrosive to skin and irritant to eye‚ be cautious and
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salt to see if it will harm the grass. First‚ thing is to get all the equipment needed to perform this experiment. I will need three round flower pots 1 inch in diameter and height. I will be using ¼ cup of ammonium sulphate fertilizer and ½ cup of sodium chloride concentrations salt‚ rock salt (halite)‚ and calcium magnesium acetate salt (Peeples‚ 1990). The last and final ingredient I will need is three different types of grass sod‚ St. Augustine grass‚ Bahia grass‚ and Buffalo grass cut in 5 inches
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(3 points each) Chemical Name Chemical Formula Common Use 1 Sodium hydroxide NaOH Drain cleaner 2 Sodium bicarbonate NaHCO3 Baking soda 3 Aluminum oxide Al2O3 Sandblasting sand 4 Sodium hypochlorate NaClO Bleach 5 Aluminum sulfate Al(SO4)3 Used in antiperspirant 6 Ammonium bromide NH4Br Used in photography 7 Ammonium chloride NH4Cl Used in photography 8 Ammonium carbonate (NH4)2CO3 Smelling salts 9 CaCO3 Limestone/chalk 10 Sodium chloride NaCl Table salt 11 Calcium chloride CaCl2 De-icer for
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