and all samples looked the same therefore we had to carry out a series of tests to figure out what structures they were made of. Some simple sugars‚ including glucose‚ can be made to reduce blue copper sulphate to red copper oxide. This reaction can be used as a test for some sugars. Copper sulphate is mixed with other chemicals to be used as Benedict’s solution which is used in the test. This was the test for reducing sugars. If the reducing sugar test comes out as negative (no colour change)‚
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Gel filtration chromatography on Sephadex G-50 The crude broth obtained after fermentation was subjected to ammonium sulphate precipitation at 70% (w/v). The pellet so obtained was resuspended in cold saline (2 ml) and dialysed. The dialysed enzyme was loaded onto a column of Sephadex G-50 (120 cm × 1.0 cm) equilibrated with 10 mM Tris-HCl buffer‚ pH 8. The column was eluted at a flow rate of 1 ml / 6 min. The elution profile of gel filtration chromatography is shown in the (Fig: 1). The fractions
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copper in your antique brass sample. G621: Analysis at Work – Sample Assignment C Finding the Percentage of Copper in a Brass Alloy Technicians’ Guidance: Please read this guidance before issuing the practical. Calibration • Copper sulphate 0.1 mol dm-3 can be used – as indicated in experimental details Assignment C. • However‚ Cu(NO3)2 (aq) rather than CuSO4 could be used in the calibration in case of a colour difference of the hydrated copper ions in the two solutions. Antique
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Finding the percentage of copper in brass alloy. Introduction This is an investigation to find out how much copper is in a brass alloy. The brass alloy we are experimenting on is called Muntz Metal. Muntz metal is 60% copper‚ 40% zinc and a hint of copper [http://en.wikipedia.org/wiki/Muntz_metal] (accessed 4/10/12). Muntz metal was developed as an alternative to expensive‚ heavy copper. It is comprised of about 60% copper and about 40% zinc‚ with a small amount of iron. The finished product actually
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transported all round the body. When young people are growing rapidly‚ the body may not have enough iron and this causes anaemia. This can be remedied by a course of ‘ferrous sulphate’ tablets‚ often known as iron tablets. e ap .c rs om The iron in iron tablets is in the form of hydrated iron(II) sulphate (sometimes called ferrous sulphate). As the name iron(II) suggests‚ the Fe2+ ion is present. To determine just how much Fe2+ is in each tablet‚ we can react the Fe2+ ions with manganate(VII) ions‚ which
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Before I go on about the use of fertilizers in organic farming‚ you must first understand what organic farming is. The simplest way to describe organic agriculture is agricultural production without the use of synthetic chemicals (fertilizers‚ pesticides‚ antibiotics‚ etc). For crop production‚ organic materials such as compost and manure are used to maintain soil organic matter and as sources of nutrients. Nitrogen-fixing as well as pest resistant plant varieties are utilized. The incorporation
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milky and also turns K2Cr2O7 (potassium dichromate) paper from orange to green. Sodium sulphide forms H2S gas with rotten egg smell and also turns lead acetate paper silvery black. c)Sodium sulphide (Na2S)& Sodium sulphate (Na2SO4) using barium chloride(BaCl2) Ans: Sodium sulphate (Na2SO4) forms white ppt. with barium chloride (BaCl2)‚ Sodium sulphide (Na2S) does not form any ppt. with barium chloride(BaCl2) d)Sodium chloride (NaCl)&Sodium nitrate (NaNO3) using conc. Sulphuric acid Ans: Sodium
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September 20‚ 2010 IKMAL’10 Page 2 Sulphuric Acid Uses of Sulphuric Acid Sulphuric acid is very important industrially‚ and has many uses including:a. The production of fertilisers such as ammonium sulphate‚ potassium sulphate‚ calciumsuperphosphate (Ca(H SO 2 (g) or Heating of metal sulphide such as lead(II) sulphide 2PbS(s) + 3O 2 (g) ---> 2PbO(s) + 2SO 2 (g) or Combustion of hiydrogen sulphide
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Cracks and Repairs R.C.C. Structures Tool Kit for Engineers 4.10/ P/ 1 Cracks in building • Structural cracks – due to incorrect design – faulty construction – Overloading • Non Structural cracks – – – – – – – Moisture changes Thermal movement Elastic deformation Creep Chemical reaction Foundation movement and settlement of soil Vegetation Tool Kit for Engineers 4.10/ P/ 2 Non Structural cracks: Moisture Changes Building materials expand on absorbing
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adedd to the water‚ and the amount of Zinc‚ and the water in the cup. Dependent- Change of Water temperature. Materials -Measuring Celinder-Copper Sulphate Solution ( 1M CuSO4) -Polystyrene Cup- Zinc Powder -Balance-Thermometer -Watch or a Clock with second hand- Safety Spectacles Procedure First‚ we measured 25 ml of Copper Sulphate Solution into a Polysterene Cup. Then‚ we weighed 6g of Zinc Powder on a piece of paper. We put the thermometer into the polysterene cup‚ we stirred
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