(Sorry my pictures are out of order a little bit, Blogger does not let me position them the way I would like. I tried to label them as best I could)
The first thing we had to do today in order to do the lab was answer the pre-lab questions correctly. I was really nervous for these pre-labs because I was trying to calculate the practice questions and I was getting very confused. Personally, I felt like they were different than the ones we did in class. After the question came on the screen, I felt better about solving it. Fortunately, I correctly solved the question and my partner and I were able to go to lab!
INTO LAB WE GO!
Today our general procedure (pictures included at the end) was to:
1. Find the mass of a dry 100 mL beaker.
2. Place a piece of zinc into the beaker.
3. Determine mass of beaker plus zinc.
4. Add 10 mL of 3M HCL into the beaker.
5. Gently heat mixture on a hot plate until all of the zinc had dissolved and the water boiled away. (you should be left with a salt)
6. Heat substance for 5-10 minutes (or until it turns white) on high
7. Cool for a couple minutes.
8. Find the mass of the beaker and its contents.
8. Find the mass of the beaker and its contents.
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| 3M HCL |
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| Zinc Dissoving |
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| Starting to boil |
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| Zinc in Beaker |
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| Pouring |
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| Boiling |
Our Data and What is Means
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| Data Table and Calculations of the Amount of Zinc and Chlorine in the Salt |
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| Calculation to find the Empirical Formula |
For those that were unable to complete the lab here is a link to a video of what we did:Formula of a Chloride Lab (keep in mind that we used different measurements)
If you are having trouble calculating empirical formulas, here is a link to a video to help you understand the steps and to take a quiz to test your knowledge: Internet Science Room or ChemTeam
If you are having trouble calculating empirical formulas, here is a link to a video to help you understand the steps and to take a quiz to test your knowledge: Internet Science Room or ChemTeam
Megan, thanks for posting about the lab. This really helps me understand the lab because I had not been able to complete it. Also, thanks for adding the link for the lesson about empirical formulas, and I will be sure to review it before the test.
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