CHEMICAL REACTIONS OF COPPER AND PERCENT YIELD Objective To gain familiarity with basic laboratory procedures‚ some chemistry of a typical transition element‚ and the concept of percent yield. Apparatus and Chemicals |0.5 g piece of no. 16 or no. 18 copper wire |evaporating dish | |250 mL beaker (2) |weighing paper | |concentrated HNO3 (4 – 6 mL)
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Lab Report: Identifying Physical and Chemical Changes Nelson Science Perspectives 10 section 5.2 Amazing Student September 17‚ 2012 Mrs. Volkmann SNC 2D Purpose: To collect evidence and then use it to identify physical and chemical changes. Hypothesis: I predict the following: Change 1 will be a chemical change Change 2 will be a chemical change Change 3 will be a physical change Change 4 will be a chemical change Change 5 will be a chemical change Change 6 will be a physical
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An Iranian General believes they are being set up‚ maybe by Israel. They struggle with deciding to attack first or not. CNN covers the attacks‚ but makes a decision to report only cleared information. The US finds evidence of a chemical lab in Iran. Sarah fears that Muller will take the world down with the “Samson Option‚” a last resort‚ nuclear attack. Sarah contacts KING HASSAN of Jordan for information and evidence points that Abba may be working
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Purpose: The purpose of this experiment is to: determine the limiting reactant of a chemical reaction that involves iron filings and a copper sulfate solution. Second‚ to determine the mole ratios between iron and copper and to show that a single replacement reaction occurs when iron and copper sulfate react with each other. And lastly‚ to determine/calculate the percent yield to better analyze the chemical reaction between iron and copper sulfate to produce copper and iron sulfate. The method
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As stated previously the purpose of this experiment was primarily based on about chemical changes. Many chemical changes are viewed through a screen‚ or read from a book. In this experiment‚ chemical changes are viewed directly from the eyes of the scientist. The procedure first begins by gathering all needed materials. Next‚ laying the first powder on four wells‚ followed by the next powders‚ each powder was placed on four wells. The liquids were then placed on each powder using the four droppers
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Physical and Chemical Reactions Lab #4 Alesa Cannon Objective: To investigate the physical and chemical properties of a pure chemical substance. Procedure: 1. Half-fill one well of a 24-well plate with 6 M HCl and half-fill a second well of the 24-well plate with 6 M NaOH. Suck up these chemicals into their labeled pipets for later use. 2. Perform the following steps on each of the substances to be tested. Complete all tests of one substance and record your observations before proceeding
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March 18‚ 2012 Title: Types of Chemical Reactions Data: Reaction Observations Evidence #1 It turned a reddish brown and the liquid went clear. The color change proved it was a chemical change. #2 The reaction turned yellow and it separated and created a fog. The solid formed precipitation and had a color change during the reaction proving it to be a chemical change. #3 There was green smoke and the crystals turned black. The green liquid turned dark green and continued to sizzle with
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Michelle Felton Observation of Chemical Changes June 17‚ 2014 Chem 107 Purpose: To associate chemical properties with household products To observe some properties of chemical reactions Procedure: Using a 96 well plate and a pipette each chemical was placed into its individual well‚ two drops of a second chemical were added and the observations of the reaction/changes were recorded. The new mixture was viewed on a light and on a dark background to observe all changes. Data
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Title: Physical and Chemical Properties Purpose: To investigate the physical and chemical properties of pure substances as distinguishing characteristics. Procedure: 1. Set up a well plate with 24 pieces and fill two with either Dilute HCl or Dilute NaOH. 2. Set up four test tubes with any single substance in each one. 3. Observe and record original color and odor of substance. 4. Light flame with matches. -Hold test tube with substance in it over flame with clamps -Observe and record
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LAB # 6 MASS RELATIONSHIPS IN CHEMICAL CHANGES October 22‚ 2012 Patricia D Partner: Mike C MASS RELATIONSHIPS IN CHEMICAL CHANGES PURPOSE The purpose of this experiment was to study the fundamental idea that in chemical reactions‚ or changes‚ all particles of one substance will have the same average mass‚ but particles of different substances will have average masses different from each other. These changes occur in ratios‚ and rarely
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