Cheatsheet Version 2.0 © 2008 Ankur Banerjee All Rights Reserved. Only important stuff for CBSE Class 12th Chemistry practical syllabus has been included‚ not everything. 2. WE + acidified K2Cr2O7 2 = sol 3 turns green 3. WE + acidified KMnO4 = pink colour of KMnO4 is discharged 4. Sulphide: Colourless gas with a smell of rotten eggs (H2S); turns lead acetate paper black 1. Sodium nitroprusside test: WE + sodium nitroprusside 4 = purple / violet colour 2. Lead acetate test: WE + lead acetate 5 (aq)
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Potassium iodide‚ KI‚ 0.2 M Sodium sulfate‚ Na2SO4‚ 0.2 M Sodium carbonate‚ Na2CO3‚ 0.2 M Sodium nitrate‚ NaNO3‚ 0.2 M Test Reagents: Silver nitrate‚ AgNO3‚ 0.1 M Ammonia‚ NH3‚ 6 M Nitric acid‚ HNO3‚ 6 M Potassium permanganate‚ KMnO4‚ 0.1 M Mineral oil Sodium hydroxide‚ NaOH‚ 6 M Barium hydroxide‚ Ba(OH)2‚ saturated Barium chloride‚ BaCl2‚ 0.1 M Acetic acid‚ HC2H3O2‚ 6 M Aluminum(s)‚ granules Iron(III) nitrate‚ Fe(NO3)3 0.1 M in nitric acid‚ HNO3‚ 0
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VI. Results and Discussion In this exercise‚ the goal was to produce acetylsalicylic acid through the organic synthesis from the reaction of salicylic acid to acetic anhydride‚ the starting materials. Instead of using acetic acid‚ acetic anhydride was used as solvent since the anhydride reacting with water to form acetic acid tends to drive the reaction to the right. It results from the elimination of a molecule of water from two molecules of acetic acid (see Fig. 11.2). Figure 11.3 below
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and color were noted by simple physical observation. Nitration Testing was conducted for preliminary parallel testing until a positive result of yellow oil was seen. For the second and final testing‚ oxidation was done through introducing 3 drops of KMnO4 reagent and 2 drops of 10% NaOH solution to 5 drops of the sample organic compound in a test tube. The identity of the hydrocarbon was determined‚ thus having naphthalene in hexane as the yielded identity of the given sample. Introduction Hydrocarbons
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Sang Kim Enzyme Catalyst Purpose/Problem: There are four parts to the Enzyme Catalyst lab - Activity A‚ B‚ C‚ and D. In activity A‚ the characteristics of enzyme actions will be observed. The main purposes are to determine the rate of an enzyme catalyzed reaction‚ to study the characteristics of an enzyme mediated reaction‚ and to observe the effect of heat on enzyme activity. The purpose of activity B is to use the Titration Protocol to determine the initial amount of H 2O2 present
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1. An organic compound X with a molecular formula C2H6O undergoes oxidation with in presence of alkaline KMnO4 to form a compound Y. X on heating in presence of Conc. H2SO4 at 443K gives Z. Which on reaction with H2Oin presence of H2SO4 gives back `X` `Z` reacts with Br2 (aq) and decolorizes it. Identify X‚ Y‚ & Z and write the reactions involved. 2. An organic compound ‘A’ is widely used as a preservative in pickles and has a molecular formula C2H2O2. This compound reacts with ethanol to
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correct compound. Another way to do this is to use a chemical test. There are multiple chemical tests that can be used‚ one of them being the bromine test. A bromine test is used to verify whether an OH group is present or not. Another test is used with KMNO4 to test whether and alkene is present or not. Using both chemical tests and infrared spectroscopy to analyze the substance it
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the acetylene as it undergo Ammoniacal silver nitrate test‚ Bromination and oxidation. The reagents that were used to perform this experiment were benzene‚ cyclohexane‚ concentrated H2SO4‚ Calcium Carbide‚ 1.0 M Br2 in CCl4‚ cyclohexane‚ and 1.0 M KMnO4. The apparatuses that were used are micro test tubes‚ 2.0 mL pipet‚ iron clamp‚ 8-in test tube‚ evaporating dish‚ water trough‚ small corks‚ and iron stand. To group were able to meet the objectives of this experiment since the procedures for this
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H2O2 into a clean glass beaker. Add 1 mL of H2O (instead of enzyme solution). Add 10 mL of H2 SO4 (1.0 M). Mix well. Remove a 5-mL sample. Place this 5-mL sample into another beaker and assay for the amount of H2O2 as follows. Use a syringe to add KMnO4 ‚ a drop at a time‚ to the solution until a persistent pink or brown color is obtained. Remember to gently swirl in the solution after adding each drop. Check to be sure that you understand the calibrations on the syringe. Record your reading. Proceed
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Quan Chapter 15: Redox Titrations 1. (A) Which of the following is true of a redox titration? (i) Since the redox reaction is spontaneous‚ the equilibrium constant does not have to be large for an effective titration. (ii) The titration effectiveness is increased when the two half-reaction potentials are far apart. (iii) Without an indicator the equivalence point cannot be detected. (iv) For an effective redox titration‚ the reducing agent must always be in the buret. (v) The equivalence
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