Bubbling Cabomba pondweed Teaching Notes Introduction Like many other water plants‚ Cabomba has specialised tissue called aerenchyma that allows gases to diffuse inside the plant. Aerenchyma provide buoyancy and allows oxygen transport to the submerged roots that may otherwise be in hypoxic (low oxygen) conditions. If you cut through the aerenchyma‚ oxygen can escape. This can be made use of this in the classroom to show how the rate of photosynthesis is affected by light intensity or by
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that cadmium is present in the solution. | |3-1 Isolation of Group 3 Cations |HNO3 and H2O were added to the solution from 2-2 and heated to evaporate down to 1-2mL and expel all H2S. When tested with acetate paper after 18mins it did not change colour. |No more H2S was given off because the acetate test was negative. |
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ion [H+ (aq)] = soluble hydrogen chloride‚ HCl‚ is soluble any anion + ammonium ion (NH4) = soluble ammonium chloride‚ NH4Cl‚ is soluble nitrate NO3- + any cation = soluble potassium nitrate‚ KNO3‚ is soluble acetate (CH3COO-) + any cation (except Ag) = soluble sodium acetate‚ CH3COONa‚ is soluble Chloride (Cl-)‚ Bromide (Br-)‚ Iodide (I-) + Ag+‚ Pb2+‚ Hg2+‚ Cu+‚ Tl+ = low solubility (insoluble) silver chloride‚ AgCl‚ forms a white precipitate + any other cation = soluble potassium
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CHEMICAL REACTIONS: ACID-BASE BUFFERS Short Overview Acids and bases represent two of the most common classes of compounds. Many studies have been done on these compounds‚ and their reactions are very important. Perhaps the most important reaction is the one in which an acid and base are combined‚ resulting in the formation of water (in aqueous solution) and a salt; this reaction is called neutralization. A buffer solution is a solution that contains both an acid and a salt
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College‚ Jamner.Pin – 424 206 Abstract : Thin films of Pb(S‚Se) [lead sulfoselenide] have been prepared on glass substrate at 50°C by simple chemical bath deposition technique. The starting materials used for deposition were lead acetate‚ tri-sodium citrate‚ sodium sulphite and elemental selenium. Ammonium hydroxide solution was used to adjust pH of the bath. In order to obtain good quality thin films‚ time‚ deposition temperature and pH of the solution were optimized and they are
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Classification Tests for Carboxylic Acid and Derivatives Mary Catherine Sarte‚ John Emmanuel Sy‚ Allurie Umel‚Franklin Yap‚ Mary Christine YouIntroduction Carboxylic acids derivatives are simply groupsof compounds that contain a carbonyl group butwith an electronegative atom attached to thecarbon. The difference in the structure leads to amajor change in reactivity. The reactions of thesegroups of compounds involve nucleophilicsubstitution. Although there are abundant kindsof carboxylic acid derivatives
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6.6.2 Poly(ethylene Terephthalate)1-2 6.6.2.1 General Poly(ethylene terephthalate)‚ or PET‚ is a thermoplastic polyester resin. Such resins may be classified as low-viscosity or high-viscosity resins. Low-viscosity PET typically has an intrinsic viscosity of less than 0.75‚ while high-viscosity PET typically has an intrinsic viscosity of 0.9 or higher. Low-viscosity resins‚ which are sometimes referred to as "staple" PET (when used in textile applications)‚ are used in a wide variety of products
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Literature Survey 2. Literature Survey Literature survey indicated 135 possible routes for the synthesis of 2-Aminobiphenyl. It must be noted that all routes available were lab-scale and no patents for the desired compound were available. Also‚ majority of these synthesis routes gave extremely low yields of our desired product and produced a number of other by-products in higher yields. Therefore‚ only the pathways giving significant yields of the desired product have been listed below. i. Suzuki
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Since its discovery‚ the production of Sermorelin acetate has been carried out by Serono under the brand name GEREF. GEREF has been used in the diagnosis and treatment of growth hormone deficiency with additional uses in Anti-aging Therapy in combination with Testosterone in men. It has been widely used
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I found that among mentioned substances acetone and ethylene glycol are soluble in water‚ therefore we can say that they are polar substances. Besides‚ I observed that biphenyl‚ butyl acetate‚ glycerol and motor oil are nonpolar substance. These compounds were soluble in hexane. Meanwhile‚ magnesium oxide and sodium bromide did not dissolved in either water nor in hexane. Moreover‚ Iodine and aspirin acted different than what I expected
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