Lab Team Six Stoichiometry of copper HOME HYPOTHESIS

Lab Team Six Stoichiometry of copper HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE Brittany Hanson & Charlie Jannsen 2 nd Period Chemistry March 2002

What is the purpose of the laboratory? HOME HYPOTHESIS FLOW CHART PURPOSE To Prove Antoine Lavoisier’s Law of Conservation of Matter: DATA GRAPHS QUESTIONS ARTICLE “Matter is Neither Created or Destroyed in any Process”

Pre-Lab Questions HOME Properties of Cu: HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE üSoft MetalüMalleable and Pliable üReddish in Color üResistant to Corrosion üReacts withüOxygen and Carbon Dioxide

Pre-Lab Questions HOME Balanced Equations: HYPOTHESIS FLOW CHART PURPOSE Cu + HNO 3 Cu(NO 3)2 + NO 2 + H 2 O 2 Cu(NO 3)2 + 4 Na. OH Cu(OH)2 + 4 Na. NO 3 Cu(OH)2 Cu. O + H 2 O DATA GRAPHS QUESTIONS ARTICLE

Pre-Lab Questions HOME Balanced Equations: HYPOTHESIS FLOW CHART PURPOSE Cu. O + H 2 SO 4 Cu. SO 4 + H 2 O Cu. SO 3 + Zn Cu + Zn. SO 4 DATA GRAPHS QUESTIONS ARTICLE

Pre-Lab Questions HOME Safety Hazards: HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE üBurns üCorrosive Chemicals üToxic Gases

Pre-Lab Questions HOME Copper Sulfate: HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE Created from the Copper-Oxide (Cu. O) and Sulfuric Acid (H 2 SO 4) •

Pre-Lab Questions HOME Step where Cu is recovered: HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE The Copper is Recovered in Step Eleven When the Final Reaction Produces Cu +Zn. SO 4

Pre-Lab Questions HOME Method to dry final Cu: HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE A Steam Bath is Used in the Final Drying Process

Hypothesis HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE If two grams of copper goes through numerous chemical reactions then the initial amount should be recovered.

Experimental Design HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE

Flow chart HOME HYPOTHESIS FLOW CHART PURPOSE Gather Materials 2 grams of Cu in 250 m. L beaker Add 25 m. L HNO 3 & cover w/ glass DATA Put beaker in ice bath GRAPHS Add 25 m. L of Na. OH, test p. H QUESTIONS ARTICLE Add 50 m. L H 2 O & boil Let settle, & decant twice

Flow chart cont. HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS Add 10 g Zn & stir 10 min Add 30 m. L H 2 SO 2 & swirl Add 20 m. L H 2 SO 2 after gas ceases Add 50 m. L H 2 O & decant QUESTIONS Evaporate H 2 O w/ steam bath ARTICLE Find weight of copper

Data HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE Data Table 1 quantitative data

Data cont. HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE Data Table 2 quantitative data

Data cont. HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE Data Table 2 quantitative data

Calculations HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE ü Mass of Copper ü Final Moles of Copper: ü 2. 0 g Cu * 1 mol Cu = 0. 03 mol Cu 63. 55 g Cu ü Initial Moles of Copper: ü 2. 0 g Cu * 1 mol Cu = 0. 03 mol Cu 63. 55 g Cu ü Percentage Recovered: ü 0. 03 mol Cu / 0. 03 mol Cu = 100%

Questions HOME Critical Thinking Analysis: HYPOTHESIS FLOW CHART 1. Why is the Product Put on Ice? PURPOSE DATA GRAPHS QUESTIONS ARTICLE ü Because the chemical reaction between Cu and HNO 3 produces heat

Questions cont. HOME Critical Thinking Analysis: HYPOTHESIS FLOW CHART 2. What Type of Reactions Took Place? PURPOSE DATA GRAPHS QUESTIONS ARTICLE ü Step 4: Double ü Step 7: Double ü Step 9: Single

Questions cont. HOME Critical Thinking Analysis: HYPOTHESIS FLOW CHART 3. Problem From Incomplete Reactions? PURPOSE DATA GRAPHS QUESTIONS ARTICLE ü Equation ü Incomplete reaction wouldn’t result in the separation of Cu and H 2 SO 4, because there isn’t an excess of anything, the equation is already balanced.

Questions cont. HOME Critical Thinking Analysis: HYPOTHESIS FLOW CHART PURPOSE 4. Account for difference in mass of initial amount and Cu reclaimed. DATA GRAPHS QUESTIONS ARTICLE ü While we retrieved the same mass is our second trial, some of this mass was copper sulfate and not pure copper.

Article HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE ü Copper ü Author Mai Tran ü Copper is an essential mineral that plays an important role in iron absorption and transport. Only 70 -80 mg of copper are found in the body of a normal healthy person. ü Hyperlink to article

Thank You for Your Time HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE Any Questions?

HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE

Calculations cont. . HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE

Gather Materials HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE

Find the Weight of Copper HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE

Adding NOH 3 HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE

Cu. SO 4 + Zn HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE

HOME HYPOTHESIS FLOW CHART PURPOSE DATA GRAPHS QUESTIONS ARTICLE

Scoring Grade: 4 Content: Class Avg. ( ) Mine (3) Few typos! No Conclusion in presentation, analysis of data was a little unclear, excellent presentation until the end - Label axis of graphs Delivery: Class Avg. ( ) Mine (4. 5) No the names and pronunciation of chemicals. NO 2 Visuals: Class Avg. ( ) Mine (4. 5) Good use of visuals in flowchart-all steps could have been included and would have helped Hyperlinks: Yes. Conlcusion Supported: Unclear due to hyperlink, but YES I believe that it was