Rate Of Reaction Lab

Rate of Reaction Lab
Aim:
To conduct a lab that investigates how different concentrations of hydrochloric acid (HCL) have an effect on the rate of reaction when mixed with Calcium Carbonate Chips (CaCO3) to produce carbon dioxide (CO2).
Hypothesis:
The higher the concentration of hydrochloric acid, the less time it will take for the reaction to occur. This links back to the collision theory which states that if a system has more collisions, there will be a greater number of molecules bouncing into each other. I believe that an acid with higher molar volume has a better chance of reacting faster than that of a weaker acid with a smaller molar volume because the higher the molar concentration of the HCL, the more molecules the acid will have

Place delivery tube in the bucket of water then into the water filled graduated cylinder (delivery tube should be approximately 5-10cm up the graduated cylinder)
10. Attach the end of the delivery tube, that is not in the bucket, to the hole of the cork
11. Pour the 50ml of HCL that you have measured, into the conical flask
12. As soon as all of HCL is poured into the conical flask, begin the stop watch, and close the top if the conical flask with the cork tightly
13. Measure rate of CO2 produced in the upside down 250 graduated cylinder (you will see that the water levels begin to decrease from the top of the cylinder. The gas at the top of the cylinder is CO2)
14. One individual will be watching the increase of CO2 and controlling the timer, while the other will be holding the test tube and recording the increase of CO2
15. At every 15 second interval, record the volume of CO2 gas produced in the cylinder, into a table, until you have reached 180 seconds (you must perform three trials for each concentration of HCL)
16. Carefully pour out all of the HCL that was in the conical flask and thoroughly rinse CaCO3 chips and conical flask with tap water
17. Place rinsed CaCO3 chips back into conical flask ready to begin following

In this experiment I set up a lab that examined how 5 different concentrations of HCL (each concentration differing by 5ml of HCL) reacted with CaCO3 and performed three trials for each concentration of HCL, I then found then average of the results and used the averages to form an accurate graph comparing the rate of reaction for each concentration of HCL when mixed with CaCO3 chips. In this experiment I placed 5g of CaCO3 chips in a conical flask and then mixed the different concentrations of HCL with the calcium carbonate. As soon as all of the acid was poured in I attached a delivery tube to the conical flask and watched the CO2 form in upside down graduated cylinder (see diagram). The reaction observed