base TS‚ and heat in a boiling water bath for 20 seconds. Use the mixture immediately. Lead Nitrate Stock Solution— Dissolve 159.8 mg of lead nitrate in 100 mL of water to which has been added 1 mL of nitric acid‚ then dilute with water to 1000 mL. Prepare and store this solution in glass containers free from soluble lead salts. Standard Lead Solution— On the day of use‚ dilute 10.0 mL of Lead Nitrate Stock Solution with water to 100.0 mL. Each mL of Standard Lead Solution contains the equivalent
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2. Three of the reactant combinations made a precipitate. The first precipitate was ammonium hydroxide because the solution became cloudy as soon as the ammonium hydroxide came into contact with the cupric chloride. Second was the sodium carbonate because it did not mix with the cupric chloride at all. The sodium carbonate left what looked like white ribbons in the original solution. Last was the silver nitrate because part of the compound was left on the surface of the cupric chloride‚ creating
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form copper (II) nitrate. Then I reacted copper and several other solutions such as‚ sodium hydroxide‚ sulfuric acid‚ ammonium hydroxide‚ and hydrochloric acid to form precipitates. In conclusion my percent recovery of copper was 100% due to the adequate amounts of solutions and achievement of proper chemical reactions. Equipment and Materials: ← Copper Metal (penny) ← Nitric Acid (HNO3)(aq) ← Sodium Hydroxide (NaOH)(aq) ← Sulfuric Acid (H2SO4)(aq) ← Ammonium Hydroxide (NH4OH)(aq)
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0.1 g of ammonium dichromate phenolphthalein tongs strip of magnesium spatula NaOH HCl sodium nitrate potassium chloride. magnesium sulfate calcium nitrate sodium carbonate. Safety notes:
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4-Dinitrophenylhydrazine‚ Fehling’s solution‚ Schiff’s reagent‚ Tollen’s test‚ bromine water‚ cerric ammonium nitrate‚ ferric chloride‚ esterification‚ sodium bicarbonate‚ silver nitrate‚ Barfoed’s test‚ Borax Test‚ Bial test‚ Osazones‚ Seliwanoff’s test‚ Molisch test‚ Beilstein test‚ hydroxamic test‚ sodium hydroxide hydrolysis‚ complex copper formation‚ ninhydrin test‚ nitrous acid‚ alkaline hydrolysis and‚ Zinc and ammonium chloride hydrolysis were used for the test for presence of functional groups. II
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Energy Flow Brittney Scarborough SCI/ 275 January 23‚ 2015 University of Phoenix Energy Flow In figure 4-10‚ there are three trophic levels. The first level is the producers. The second level is the first consumer and the last level is the second consumer. The plant is the producer‚ the rabbit is the first consumer and the fox is the second consumer. A producer absorbs the energy from the sun. It creates its own food by photosynthesis. The first order consumer eats the plant that has the most energy
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plastic 1 Cylinder-25-mL 1 Pencil‚ marking 1 Test Tube (5)‚ 13 x 100 mm in Bubble Bag 1 Well-Plate-24 1 Ammonium Molybdate‚ 0.2 M - 2 mL in Pipet 1 Aqueous Ammonia‚ 6 M‚ NH4OH - 4 mL in Pipet 1 Barium Chloride‚ 0.3 M - 2 mL in Pipet 1 Hydrochloric Acid‚ 6 M - 8 mL in Dropper Bottle 1 Nitric Acid‚ 6 M - 2.5 mL in Pipet 1 Organic Reagent - 1.5 mL in Vial 2 Pipet‚ Empty Short Stem 1 Silver Nitrate‚ 0.1 N - 6 mL in White Dropper Bottle 1 Sodium Bromide‚ 0.1 M - 2.5 mL in Pipet 1 Sodium Carbonate
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Zinc Zinc Sulphate + Hydrogen H2SO4(aq) + Zn(s) ZnSO4(aq) + H2(g) Nitric acid + Aluminium Aluminium Nitrate + Hydrogen 2HNO3(aq) + 2Al(s) 2AlNO3(aq) + H2(g) 2. ACID + BASE –––––––> SALT + WATER Hydrochloric acid + Copper II Oxide Copper II Chloride + Water HCl(aq) + CuO(s) CuCl(aq) + H2O(l) Nitric acid + Aluminium Oxide Aluminium Nitrate + Water 6HNO3(aq) + Al2O3(aq) 2Al(NO3)3(aq) + 3H2O(l) 3. ACID + ALKALI –––––––> SALT + WATER Sulphuric
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when 23.61 g of sodium phosphate is dissolved in 475.0 cm3 of water. 2. What volume of water is needed to dissolve 85.8 g of silver nitrate to make a 2.650 M solution? 3. What mass of magnesium sulphate is needed to make 1500 mL of a 2.45 M MgSO4 solution? 4. Calculate the concentration of the solution formed when 59.78 g of ammonium hydroxide is dissolved in 856.0 cm3 of water. 5. What volume of water is needed to dissolve 150.8 g of lithium borate to make a 9.46 M solution
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__ IDENTIFICATION OF ACID RADICALS (ANIONS) This part is the classified into three groups: FIRST GROUP OF ACID RADICALS The acid radicals involved in this group are carbonate(CO32-)‚ Sulphide(S2-)‚ Sulphite(SO32-)‚ Thiosulphate(S2O32-) and nitrate(NO2-). The group reagent is dilute hydrochloric acid. EXPERIMENT Salt + dil. HCl OBSERVATION Effervescence or evolution of gases (a) Colourless‚ odourless gas turns lime water milky (b) Colourless with rotten eggs smell and turns lead acetate paper
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