Lab experiment – Gases
College Chemistry I – Chem. 1806
Lab Report 7 assignment
1. Complete the following data table. (10 points)
| Data Table 1 | |
| Step/Reaction | Observations |
| Reaction between zinc and hydrochloric acid | Click or tap here to enter text. |
| Hydrogen gas + Flame | Click or tap here to enter text. |
| Reaction that occurs when magnesium is in contact with hydrogen peroxide | Click or tap here to enter text. |
| Oxygen gas + Smoldering toothpick | Click or tap here to enter text. |
| Gas mixture + Flame | Click or tap here to enter text. |
2. Complete the following data table. (10 points)
| Data Table 2 | |
| Step/Reaction | Observations |
| Reaction between Ca(OH)2 and CO2 | Click or tap here to enter text. |
| Reaction between CO2 and BTB | Click or tap here to enter text. |
| Carbon Dioxide Gas + Flame | Click or tap here to enter text. |
| Reaction between Ca(OH)2 and Alka-Seltzer + water gas | Click or tap here to enter text. |
| Alka-Seltzer/water gas + smoldering toothpick | Click or tap here to enter text. |
| Reaction between Ca(OH)2 and breath | Click or tap here to enter text. |
3. What gas was produced between the reaction of hydrochloric acid and zinc? Name the gas and write the balanced chemical equation for this reaction. (2 points)
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4. What gas was produced by decomposition of hydrogen peroxide? What happened when the smoldering toothpick came in contact with the gas? (2 points)
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5. Did the reaction between Alka-Seltzer and the tap water produce hydrogen, oxygen, or carbon dioxide gas? Support your answer with results from your work in Exercises 1 and Exercise 2. (2 points)
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6. Based on your observation of the reaction that occurred when limewater was exposed to your breath, what gas did you exhale? Support your answer with the observations you made in Data Table 2. (2 points)
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7. When the bromothymol blue (BTB) was exposed to the carbon CO2 gas, what color was the solution? Did the BTB indicate the presence of an acid or base? Explain your answer. (2 points)
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8. Imagine writing a lab report about this lab. Write an introduction and conclusion for this lab. (10 points)
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