fits into the averages of the UV Absorbance‚ the R2 is 0.9538 this shows that the data is accurate as it is very close to the regression line. Taking the averages of the UV Absorbance allows the data to become more accurate and reliable. Cuvette 1M CuSO4 (mL) Distilled Water (mL) Concentration (M) UV Absorbance (Average) 1 2 8 0.2 0.566 2 4 6 0.4 0.955 3 6 4 0.6 1.243 4 8 2 0.8 1.539 5 10 0 1 1.995 Dividing the unknown solutions by y is the way to find the concentrations of the unknown solutions.
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ISOLATION OF GLUTEN FROM WHEAT FLOUR AND ITS COLOR REACTION IN DIFFERENT QUALITATIVE TESTS Abstract: Gluten is isolated from wheat flour by washing it with water‚ dissolving the flour’s water soluble components and therefore separating gluten from it. The isolated gluten was then used in different qualitative colour reaction tests. These tests determine what amino acids are present in a protein‚ in this case gluten. Introduction: Proteins are large biological molecules that are made up of amino
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HCl Hydrochloric Acid C20H14O4 Phenolphthalein A6 NaOH Sodium Hydroxide AgNO3 Silver Nitrate B1 AgNO3 Silver Nitrate NH4OH Aqueous Ammonia Observation 1: + Absorb in paper towel and expose to sunlight Observation 2: B2 NH4OH Aqueous Ammonia CuSO4 Copper Sulfate Questions A. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). Using your results from Data Table 1 as a guide‚ how would you test this material for the presence of sodium bicarbonate
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EXTRACTION OF COPPER FROM OXIDISED COPPER ORE Aim: To analyse how copper is obtained from oxidised copper ore using the processes of leaching‚ solid-liquid separation‚ displacing and electrowinning. Method: Refer to ‘Extraction of Copper from oxidised Copper Ore’ document pages 1-2 Results: Leaching: The blue particles in the copper ore which is copper was dissolved in the sulphuric acid and the solution turned into a blue colour. There was also sediment that was floating around
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Experiment 1 Calorimetry Chem 17 Univerity of the Philippines Diliman Discussion All chemical reactions involve energy. By understanding the behavior and connection of energy flow within a chemical reaction‚ we can understand and manipulate them to our advantage. The most common form of energy observed during chemical reactions is heat. The reaction may absorb (endothermic) or release (exothermic) heat‚ depending on the reacting substances. Calorimetry is the process of measuring the heat flow
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Name: Jayanti Magar Title: Observations of Chemical Changes Date: 02/11/015 Pre Lab Questions: Use what you learned in this lab to answer the following questions. A. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). How would you test this material for the presence of sodium bicarbonate? I would add hydrochloric acid (HCl) with carbon dioxide with NaHCO3‚ and it should bubble and form gas. B. You know what color phenolphthalein and bromothymol
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odor. Yes NaOH + AgNO3 It turned greenish brown with clumps of solid with no odor. Yes AgNO3 + NH4OH – Observation 1 It turned cloudy white‚ with no odor. Yes AgNO3 + NH4OH – Observation 2 It turned a brownish pink color with no odor. Yes NH4OH + CuSO4 It turned dark purple and Yes
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for aldehydes - - Test for easily oxidizable compounds (ex. Aldehydes) Positive: Silver mirror deposit - - Polyhydroxyaldehydes (aldoses) Polyhydroxyketones (ketoses) - Classifications: Test for reducing sugars Reagent: CuSO4‚ sodium citrate and sodium carbonate in a mildly basic solution Positive test: Brick red precipitate OSAZONE TEST 1. Simple - monosaccharides 2. Complex – disaccharides‚ polysaccharides - Hemiacetals/Hemiketals - Dehydration test
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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 Brass • Small brass screws can be used (washed with alcohol / acetone and dried). • 1.5 g will give a concentration of
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Santiago Canales Partner: Cody Patterson MR. G Physical and Chemical Changes lab Pre lab discussion 1. a- chemical change b- chemical change c- physical change d- chemical change e- physical change 2. Change in color‚ gas‚ light or smoke and heat. 3.Becuase if the temperature changes you can notice it better this way. 4. I will use goggles and cloves all the time‚ I also need to point dangerous materials away from other people and I should be specially cautious with hydrochloric
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