clear up after a few minutes. The flask will be warm since this is an exothermic reaction. Next‚ the mixture will be tested using potassium iodide-starch test. If the test is positive then proceed but if not then add an extra 5.00 ml of bleach and stir for 5 minutes.
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(II) sulfate solution Fill a small test tube halfway with copper (II) sulfate solution. Add a 2.0 gram iron rod to the solution and observe the reaction. 2. Lead (II) nitrate and potassium iodide solutions Pour about 2.0 mL of lead (II) nitrate into the test tube. Add 5 to 10 drops of potassium iodide solution to the test tube and record your observations of the reaction. 3. Magnesium metal and hydrochloric acid solution Place one scoop of magnesium turnings into the test tube. Add hydrochloric
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Exercise 14: Qualitative Anion Tests PURPOSE: The purpose of this experiment is to identify some commonly occurring anions & to study some of the reactions used for their identification. PROCEDURE: You must first determine to which of the three groups the various anions belong. Since no two people observe the same event in exactly the same way it is important to also conduct specific confirmation tests on the known samples of each anion. This information will help identify the anion
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(dark green ppt) Reddish-Brown ppt. [k] Insoluble in excess aq. NaOH. Fe3+ + 3OH- Fe(OH)3 (red brown ppt) iron (II) iron(III) NOTE: The observations for both lead(II) and aluminium ions are similar. To distinguish them‚ add aqueous potassium iodide KI to both solutions.
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South Street Seaweed Report Prasenjit Saha Chem lab 106 2/6/13 Spring 2014 Prasenjit Saha‚ Abdullah Sharif I. Warmup Questions 1. Coffee beans are crushed into small pieces‚ water is added to it and the mixture is heated over a flame. What do you think would happen to the coffee bean as it interacts with the water? Explain. Essentially the warm water will run through the coffee beans and extract its properties. The flavor of the coffee beans would disperse
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(c) Combustion Reaction (d) Combination Reaction 4. Which of the following is not a balanced equation? (a) Fe + Cl2 → FeCl3 (b) Mg + CuSO4 → MgSO4 + C4 (c) NaOH + HCl → NaCl + H 2O (d) Zn + S → ZnS 5. The reaction between lead nitrate and potassium iodide present in aqueous solutions is an example of (a) Decomposition Reaction (b) Displacement Reaction (c) Double Displacement Reaction (d) Neutralisation Reaction (1) (1) (1) (1) (1) Material downloaded from http://myCBSEguide.com and http://onlineteachers
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to the solution and observe the reaction. The Iron shavings change from dark gray to brown when it mixes with copper that changes from transparent to blue. 2. Lead (II) nitrate and potassium iodide solutions Pour about 2.0 mL of lead (II) nitrate into the test tube. Add 5 to 10 drops of potassium iodide solution to the test tube and record your observations of the reaction. Lead nitrate and potassium are both transparent but when they mix t changes to a yellow color. 3. Magnesium metal and hydrochloric
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Discussion and Interpretation of Results The addition of HBr to 1-hexene created a 2-bromohexane‚ as indicated from the ethanol silver nitrate test and sodium iodide/acetone test. The observations when the product was subjected to these tests were similar to what were observed with the 2° bromide compound. When subjected to the silver nitrate test‚ the product produced a precipitate at the same rate of the 2° bromide compound‚ and the product produced a hue of yellow that was also similar to the
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Title: Aim: to observe and find out how much starch grains are distributed within a transverse section of a banana Apparatus: banana‚ iodine solution‚ ruler‚ white tile‚ stopwatch‚ microscope slide‚ coverslip‚ filter paper‚ Light microscope Method: 1) A piece of banana was place on a tile and a section was cut across the piece of banana about 5mm thick. 2) The surface of the banana was covered with iodine solution and left for about one minute. 3) The distribution
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calculated. Recrystallization is to further improve the purity of tin tetraiodide. The solvent is carefully chosen to be toluene in order to maximize the recovery of tin tetraiodide during recrystallization. Experimental method1 Approximately 2.50g iodide and 1.01g tin were weighed on a balance and were placed in an Erlenmeyer flask. Approximately 10ml toluene was added to the flask. The mixture was heated on a hot plate at almost boiling temperature and was stirred using a stirring rod till the purple
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