| Title: | 1. | "Determination of the Formula of Copper Sulfide" + The usual title page stuff | ||
| Purpose: | (Translate the following to the first person point-of-view) | |||
| 2. | Calculate the mass of a specific chemical to make an assigned solution, and make the assigned solution. | |||
| 3. | Gather data from the classes to | |||
| 4. | Determine the ideal combining ratio of copper (II) sulfate pentahydrate with sodium sulfide. | |||
| 5. | Use the ideal combining ratio to determine the formula for copper sulfide and... | |||
| 6. | Write the complete balanced equation for this reaction. | |||
| Assigned Dataxxx | 7. | What chemical? What volume? What Concentration? (see Part 1 - Setup) | ||
| Calculation | 8. | Show how you determined the mass of your chemical. Use the factor label method. This is also on the handout you got for part 1 in class | ||
| Data/Results | 9. | The mass of chemical you needed for your solution. | ||
| 10. | The mass of copper sulfide produced. Include any data you used to calculate this amount. | |||
| 11. | A graph of product mass (y, in grams) and volume of copper (II) sulfate solution (x, mL). On the same graph, along the top, label an extra x-axis by indicating the ratio of moles of copper (II) sulfate to moles of sodium sulfide. The ratios should all be 1:? or ?:1. The graph should be landscape and fill the page. | |||
| 12. | Indicate your selection of the best combining ratio of the two reacting chemiclas. | |||
| 13. | A balanced chemical reaction based on your ideal combining ratio. The formula for copper sulfide is CuxSy with x and y coming from your combining ratios. Getting this formula is part of your results, so think very hard. | |||
| Neatness | 14. | This lab must be neat. I like typing J | ||
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That's 14 pieces to grade, each 0-4. |
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| 0 | No attempt, missing, or copied | |||
| 1 | Tried but missed | |||
| 2 | Close, but no cigar | |||
| 3 | Good job, no frills | |||
| 4 | Excellent, neat, creative, over the top, wonderful, leather trim AND CD-player. | |||