Marble Chips Experiment

Marble piece Experimental test Objective: To study how the concentration of hydrochloric acid affects the reaction rate with marble chips. Prediction: The more hydrochloric acid, the more predict the chemical reaction is. In addition, the higher the dilution of the acid (acid resistance of water is large), we expect chemical reaction is slow. Hypothesis: The stronger the hydrochloric acid, the higher the energy, the more collisions, so I predict what I did.

So, temperature is small (1 m) even if it is strong or weak, and small marble fragments (22 ℃) at room temperature. Inspection Result 1 Molar portion of minor chips Min / sec 1 cc 1: 41 2 cc 3: 15 3 cc 4: 46 6 cc 6: 13 5 cc 7: 35 6 cc 9: 0 3 ccc 10: 34 8 cc 11: 56 9 cc 13: 27 ccc 14 : 33 In this test, the release of carbon dioxide was very slow. It took 14 minutes and a half to complete. This is not realistic because all experiments have limited time. It took us a long time because we only put small marble chips

In this experiment, a large amount of marble and a large amount of hydrochloric acid were placed in an Erlenmeyer flask and fluff was used to collect absorbent cotton. When carbon dioxide is released from the flask, the mixture loses its mass and is measured and recorded every minute until the reaction is complete. I repeated the experiment again using the same quality marble chips and the same volume of hydrochloric acid at the same temperature, but using small marble fragments. When observing our results, we discovered that larger marble debris requires more time to react than smaller marble debris, which shows an increase in reaction rate as the surface area increases .

We accepted this experiment at a molar concentration of 0 M so 20 mL of water was added to 20 mL of water to reach 0 M. Then I will weigh 3 grams of marble chips of various sizes. Then I put marble chips in the beaker and then add hydrochloric acid. Then I will put hungry in the beakers as soon as possible. Then I let the reaction occur and record the amount of gas produced every 15 seconds for 90 seconds. Then I will repeat this experiment with medium and large chips. To confirm that there are enough measurements to reach the average value, repeat the experiment three times.