Identification of a Copper Compound by Percent Mass Unknown Compound: #9 Abstract: The objective of this experiment was to identify the unknown pure copper salt compound of #9. To do this‚ the mass of copper in the unknown was calculated and then divided by the mass of the whole compound to get the percent copper. The molecular weight was also calculated by dividing mass of copper compound used by moles of compound in unknown sample. The percent copper averaged out to 31.6% while the molecular
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Date of Experiment: June 17‚ 2012 Report Submitted: June 17‚ 2012 Title of Experiment: Observation of Chemical Changes Purpose: To examine the reaction of common chemicals from household consumer products‚ and the changes they undergo. Procedure: After combining the chemicals listed below in Data Table 1‚ I observed the mixture against white and dark backgrounds by slipping white and black paper underneath the well plate. For every reaction‚ I wrote down the chemical combination‚ the
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phenolphthalein| H4|Turned cloudy and white in color| J.|NaOH + AgNO3| H3|Brown| K.|AgNO3 + NH3| |The solution on the paper towel did not change in color even after exposure to bright light for 3 minutes.| |after exposure to bright light| || L.|NH3 and CuSO4| |Overlooked this solution and was not able to do it| Part F: Testing of Various Foods with the NaOCl + KI solution Foods|Presence or Absence of Starch| Wheat bread|Absence of starch| Macaroni Cheese Pasta|Absence of starch| Yellow corn
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Student Exploration: Identifying Nutrients Directions: In this online lab‚ you will be practicing identifying nutrients found in food. 1. Go to explorelearning.com 2. Login using the username/password your online teacher gave you at the beginning of the semester. If you forgot it‚ check your messages in blackboard. Most likely your username and password are your FirstnameLastname (no spaces). 3. Find the “Identifying Nutrients” gizmo. 4. Click on launch. Let’s get started.
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Chemical Formula Principles Chemical Formula is a system of chemical notation that was invented in 181 by John Jakob Berzelius. The system is based on the law of definite proportions”‚ states that all samples of a given chemical compound have the same elemental composition. It is also a way of expressing information about the proportions of atoms that constitute a particular chemical compound‚ using a single line of chemical element symbols‚ numbers‚ and sometimes also other symbols‚ such as
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AP Chemistry: Chapter 17 Student Notes Objectives 17.1a: Review Redox Assign Oxidation Numbers to the following: a. HNO3 b. PbSO4 c. (NH4)2Ce(SO4)3 Balance the following in acidic medium Al (s) + MnO4- (aq) Al3+ (aq) + Mn2+ (aq) Balance the following in a basic medium Mg (s) + OCl- (aq) Mg(OH)2 (s) + Cl- (aq) Balance the following Redox Reaction: The big nasty problem K4Fe(CN)6 + KMnO4 + H2SO4 KHSO4 + Fe2(SO4)3 + MnSO4 + HNO3 + CO2 +H2O 17.1: Galvanic Cells
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grit-like appearance B-2 AgNO3¬ and NH3 Nothing seemed to happen‚ no reaction‚ but when placed on a paper towel and exposed to sunlight‚ the paper turned rust colored‚ with some silvery areas. The paper towel was also extremely stiff. C-3 NH3 and CuSo4 Reaction was cloudy blue in color Data Table 2: Household Cleaning Products Well # Cleaning Product Reaction D-4
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12/102‚ First Floor‚ Aditya Complex‚ Preet Vihar Community Centre‚ New Delhi-110092 (011) 2252 7266‚ 09968761561‚ www.aimstalent.com ALL INDIA MATHS SCIENCE TALENT EXAMINATION CLASS X Total Marks: 25 Time Allowed: 30 Minutes 1. If L stands for +‚ M stands for ‚N stands for ׂ P stands for ÷ then 14N10L42P2M8= (A) 248 (B) 153 (C) 352 (D) 218 2. If the position of the third and the tenth letters of the word DOCUMENTATION are interchanged‚ and likewise the position of the fourth
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SolutionSodium hydroxideNaOH1.0 M0.27 M(1.0M)(VNaOH) (0.27 M)(100 mL) VNaOH 27 mL Dilute 27 mL of 1.0 M NaOH to 100 mL.Potassium permanganateKMnO41.0 M0.34 MDilute 34 mL of 1.0 M KMnO4 to 100 mL.Copper (II) sulfateCuSO41.0 M0.25 MDilute 25 mL of 1.0 M CuSO4 to 100 mL.Ammonium hydroxideNH4OH1.0 M0. 43 MDilute 43 mL of 1.0 M NH4OH to 100 mL.Sodium carbonateNa2CO31.0 M0.56 MDilute 43 mL of 1.0 M Na2CO3 to 100 mL. Remember‚ you cannot make a solution that is more concentrated than the original solution.
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Richard Ortiz-Luis Sorenson‚ McClave 11 November 2012 Period 0 Examination of the Formation of Precipitates between Various Aqueous Solutions of Ionic Compounds 11/12/12 Background Information: A double replacement reaction is a chemical reaction that usually takes place between two aqueous ionic compounds. In the reaction‚ the cation of one compound replaces the other compound’s cation that yields two produce two new and different compounds. A precipitation reaction is a chemical reaction
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