Experiment Title : Determination of relative densities and water absorption of coarse aggregates. Objective : To determine the relative densities and water absorption of a coarse aggregate. Description of Sample : The sample used was naturally occuring riverside aggregate and was left to soak for 24 hours prior to the experiment. Apparatus Required A pycnometer – a pycnometer is a litre glass jar which has a conical screw on it ’s lid‚ and a small aperature at the apex of the conical lid. The
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study the hardness of different types of materials‚ and to understand the significance of this property in materials. The materials and the aforesaid property have significant use in civil engineering. Hardness is defined as a measure of a material’s resistance to localised plastic deformation (i.e. small dents or scratches). As said above‚ a variety of metal alloys were used in the experiments to understand how each of these metals is characterised as a hard metal and to compare the hardness of different
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I placed a small amount of Mossy Zn in the test tube and then added HCL. I used the rubber stopper and a pipet bulb to collect the Hydrogen gas synthesis. I filled the pipet bulb with water and placed it over the rubber stopper and waited for the H2 to completely displace the water. Once it had displaced the water‚ I removed the bulb and gently squeezed it into the match flame. There was a very audible “pop” and I observed the combustion of the H2. (Step 1 cont.) I filled another pipet bulb with
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petri dish. There was one growth that was a dark grey colour with a mottled appearance‚ another that was a white colour with a mottled appearance‚ and finally one that was a tan colour with a bubbly appearance. Water: There is a small and very stale pond near my house that I took the water sample from. This was by far the most disgusting of the three observations. The growth I observed looked like a very dark Picasso painting. There was a black coloured colony that had a fuzzy appearance‚ there was
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Observations and Chemical Changes By: Andre the Giant Higgson 02/19/14 CHE 107 E1 Intro to Chemistry 1 Objective Certain Chemicals like Bromthymol blue and Phenolphthalein can be added to other chemicals to determine acidity or basicity. Other reactions can be observed as well when different chemicals are added to each other. Procedure This experiment involved placing drops of specified chemicals into a well on a 96well plate. Each well number was recorded along with question number and name of chemicals involved
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Determination of the Waters of Crystallisation/ Water of Hydration‚ In Hydrated copper (II) Sulphate Introduction In nature there are some salts that will have water in their crystalline structure. These salts are commonly known as hydrated salts. Hydrated Copper (II) sulphate is one of these‚ as suggested by the use of the word hydrated in its name. Its molecular structure is shown below. The water that is chemically combined into their structure is called the water of crystallisation.
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Reshmi Nair Title: Determination of Aspirin through back titration. Aim: To determine the concentration of Aspirin in a tablet using NaOH and Hcl. Research Question: What is the concentration of Aspirin in a normal tablet? Background: Aspirin is the general name for acetylsalicylic acid (ASA); it is also the trademark of the drug produced by Bayer in Germany. In eighty countries‚ aspirin is a registered trademark‚ but in other places the term aspirin refers to ASA by itself or as an ingredient
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and bilirubin is formed by the reduction of biliverdin. In contrast to iron and globin‚ which can be metabolically reused‚ bilirubin is an end product and toxic product that should be efficiently eliminated from the body. As the bilirubin formed is water insoluble‚ it binds to albumin upon entering the blood as unconjugated or free bilirubin. Upon the bilirubin binding to albumins‚ it is transported to the liver‚ where it undergoes conjugation and excretion. Upon its separation from albumin on hepatocyte
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Determination of KHP – Acid - Base Titration For determining purity of unknown KHP‚ acid – base titration was used. Molarity of titrant in this case NaOH was standardized as 0.04958(±0.00011) M. Purity of unknown KHP was calculated as 35.88(±0.16) %. • Introduction Acid – base titration is typical method of determining unknown figures. Acid – base titration means that by using neutralization between acid and base. Abrupt changing of pH says whether procedure is done or not. pH indicators
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Experiment #2 “Density Determinations” Report The objective for experiment #2 was “to determine densities of objects/salt solutions with different concentrations of salt‚ to see how density changes as a function of concentration.” In experiment #2‚ part II‚ calculations of Density of NaCL solutions were made from 0%-25% NaCL concentration. My hypothesis was that as the % increased‚ so would the density‚ because adding weight would increase the density of each solution. The density calculations
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