counts below were obtained after collecting sea water sample 20 times using a plankton net (net mouth diameter: 20 cm‚ net length: 30 cm‚ arm length of sampler: 45 cm) via vertical towing and transferring the concentrated sample of 110 ml to 5% borax-buffered formalin at 1:9 ratio (water sample: preservative). Determine the estimated number of the said microorganisms in the sea water given the following counts: a. using Sedgewick-Rafter tray (50 compartments‚ each with 1 mm width‚ of a single
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The equilibrium constant was found by titrating a series of reactions containing H2O‚ HCl‚ and the unknown ester with only the last solution containing the unknown alcohol. Equilibrium constants can be easily found once the concentrations of all reactants are known using Keq= [ acid][alcohol]/[ester][water]. Procedure: Part A: Prepare six bottles with the following volumes in each: Bottle # 3M HCl in mL H2O in mL Ester in mL Alcohol in mL 1 5 5 0 0 1/A 5 5 0 0 2 5 0 5 0 3 5 1 4 0 4
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Tsinigine Partner: Yuchen Title: How Much Gas CHM 151 LL Wednesday: 11:15-2:00 Instructor: Dr. Leary May 1‚ 2013 Introduction In this project we will choose a solid reagent‚ Mg‚ CaCO3‚ or Na2CO3‚ to react with a hydrochloric acid solution‚ HCl. We are going to measure the amount of gaseous product obtained from the amount of gaseous product obtained from reaction. Then compare to theoretical yield‚ Percent Yield=Actual Yield of Gas/ Theoretical Yield of Gas×100‚ based on stoichiometric prediction
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PROJECT PROFILE Product Product : : Bangle Manufacturing NOCODE326 Quality Standard Month & Year : May 2010 Prepared By : Glass & Ceramic Division MSME-DI 3rd CGO Complex sanjay place Agra GLASS BANGLES A. INTRODUCTION: Glass Bangles are products made out of block glass of different shades of colors or directly from batch material. These are sound in shape with pleasing colors and having designs over the surface. It is a customary for ladies to design wear bangles
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starch (cooled) + 3 ml saliva (cooled) in ice bath; Tube 4 = 3 ml starch + 3 ml saliva 5 drops conc. HCL in water bath. An incubation period of 1 hour was followed and each was tested for starch and maltose. A similar procedure was repeated with pepsin‚ with the test tubes prepared as follows: Tube 1 = 5 ml pepsin 5% soln + 5 ml HCL (0.5)%; Tube 2 = 5 ml pepsin (5% soln)+ water 5 ml; Tube 3 = 5 ml HCL (0.5%) + 5 ml of water; Tube 4 = 5 ml pepsin 5% soln) + 5 ml NAOH (0.5%). Lastly‚ the above procedure
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the acid and the base. In this experiment acid-base titration will be used to determine the concentration of HCl at equilibrium when it reacts with the NaOH H+ (aq)+ Cl- (aq) + Na+ (aq) + OH- →H2O(l) + Na+ (aq)+ Cl- (aq) Procedure When performing this experiment one must first obtain and wear goggles. Next add 40mL of distilled water to a 100mL beaker‚ then add 5.00mL of HCl to the beaker.Then obtain 40mL of 0.1M NaOH. Place the NaOH in a 60mL reagent reservoir and drain a small amount
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and also my merging with a company called AXON. Different Ways Messaging Was Used Instead of holding a live Blueprint meeting‚ HCL decided to have all three hundred of their managers record their business plans‚ which would then be posted on the MyBlueprint portal. Once all of the business plans were posted‚ they’d be open for review by another eight thousand HCL managers. The idea was to transform the planning process into a peer-to-peer review rather than a top-down judgment. (Nayar‚ 2010)
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Prof. T.D. Macasil BSE Physical Science Reactions of amines Reaction of amines with acids – acids and amines form ammonium salts. R – NH2 + HCl → R – NH3+ + OH – Amine acid amine salt Example 1 CH3 – NH2 + HCl → CH3 – NH3 + Cl- Methylamine Methylammonium Example 2 CH3CH2 – NH3 + Cl → CH3CH2NH2 . HCl Ethylammonium Ethylamine Reaction of amine with water – when amines react with water‚ they produce hydroxide ( OH ) R – NH2 + H2O
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H3O+ with NaOH solution can achieve the determination of the amount of acid‚ which has not reacted with the calcium carbonate. There are differences between amount of the acid (HCl) added and the amount left over after the reaction is equal to the amount used by the CaCO3. The reaction used to determine the leftover acid is: HCl (aq) + NaOH (aq) H2O + Na+ (aq) + Cl- (aq) Aim To measure the percent by mass of CaCO3 in an eggshell. Variables Independent variables: Mass of calcium carbonate in
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AgCl(soluble in 12M HCl‚ soluble in sln of good complexing agent‚ 6M NH3) | White ppt‚ PbCl2(soluble in hot water‚ soluble in 12M HCl‚ soluble in sln of xs NaOH) | Soluble – no ppt | Soluble – no ppt | Soluble – no ppt | Na2CO3 | White ppt‚ Ag2CO3(soluble in 6M HCl‚ soluble in sln of good complexing agent) | White ppt‚ PbCO3(soluble in 6M HCl‚ soluble in sln of good complexing agent) | Blue ppt‚ CuCO3(soluble in 6M HCl‚ soluble in sln of good complexing agent) | Green ppt‚ NiCO3(soluble in 6M HCl‚ soluble
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