Concentration of acid= 1 molar
Amount of CaCo3= 1.5 grams
For these results I did take me a while to set it up since I was working alone and I had to find someone to help me read the amount of volume. As you can see it did take quite some time for the CaCo3 to start reacting. But once it had reacted it went up drastically and it the volume increased very quickly. We even got past the limit (100) and wrote down what we thought it might be (103).
Concentration of acid: 1.5 molar
Amount of CaCo3: 1.5 grams
For this table of results and graph the reaction happened almost automatically and it moved up very fast. The acid was a higher concentration which probably helped a lot the speed of the reaction. Again we pasted to volume limit (100) and we had to guess what it was around which was 115 mm3.
For this table of results the rate of reaction speeded up a lot faster than the other one. It took a lot less time as well for it to reach maximum volume. These results went up by a least 15 and in the other one the reaction only started 45 seconds in!
Evaluation:
Overall, I did like this whole idea of working alone and learning to plan and prepare well. I think it was a very good exercise to practice us for the future when we will have to do everything on our own. There were so many complications though. When I came I didn`t have the proper equipment which was really inconvenient because my time was running low trying to find something that replace the already taken objects. I also messed up a couple of times either putting in too much acid or putting too much CaCo3.
Conclusion:
My end results show that the concentration defiantly affected the rate of reaction. Each time I increased the concentration the reaction was speeded up and made the volume increase drastically. The concentration also affected the time it took for it to reach maximum volume. For example, for the 1 molar acid it didn`t start up until it reached one minute! For 1.5 molar it started automatically and increased the speed of the reaction over time.
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Temperature Experiment:
Plan:
Try to get the rate of reaction to increase while increasing the temperature. I will use hydrochloric acid and CaCo3 in my experiment. I will be changing the temperature by using a kettle and a thermometer to see how high or low the temperature is. I will use the same amount of CaCo3 and hydrochloric acid but I will change the temperature. I will use 250 mm of hydrochloric acid and 2-4 grams of Calcium Carbonate. I will time how long it takes for the CaCo3 to stop reacting with the specific temperature level and then stop the timer and record and do this several times while increasing the temperature.
Materials:
- Conical Flask
- Three unit scale (grams)
- CaCo3
- Hydrochloric acid
- Timer
- Measuring cylinder
- Kettle
Method:
- Gather materials
- Get measuring cylinder and measure up to 250 mm of hydrochloric acid
- Get amount needed for CaCo3
- Set up kettle
- Heat up the hydrochloric acid
- Wait until the temperature is at what you want it
- Add CaCo3
- Start timer
- Wait until CaCo3 is done reacting and stop timer
- Record data and repeat process until the amount needed for CaCo3 is done
Concentration: 0.5 molar
Temperature: 50 degrees C
CaCo3: 2-4 grams
Concentration: 0.5 molar
Temperature: 27.8 degrees C
CaCo3: 2-4 grams
As you can see, if the temperature is high then the rate of reaction is speeded up and the molecules move much faster increasing the level of gas. When the temperature was at room temperature it took it much time to even start up and slowly moved up to the maximum volume.
For this graph I decided to mix the two tables of results together so that it can really show you the difference. For the 50*C table the reaction started right up and sky rocked from there. For the second table for room temperature 27.8*C it look more time then when it was heated. But, the reaction stayed steady and continued to climb up to the volume limit (100).
Evaluation:
For this experiment I had to get my results from my classmate Ben because I didn`t have enough time to do concentration and temperature in the space of 2 days. So, if I would have had to do this again then I would`ve asked for more to plan and to make sure that I had more results to make it a more interesting lab, and to try out more things.
Conclusion:
Over all, I think that the temperature defiantly affects the rate of reaction more because it makes the molecules move a lot faster which triggers the reaction to speed up. For the concentration it did make quite a difference but not the way the temperature affected it. When it was heated then it would go much faster and changing the concentration only make it go faster by not as much as the temperature.
Thank you I really enjoyed this experiment THANK YOU! ☺
BY: VALERIE BERGERON