Part 1: Effect of Temperature 1. Chill 100ml of tap water with ice for 2 minutes 2. Pour the chilled water into a beaker and using a thermometer, record the temperature of the water 3. Drop one Alka Seltzer tablet into the beaker and start the timer to record the amount of time it takes for the entire tablet to dissolve 4. Empty the contents of the beaker and pour 100ml of warm tap water into it. Use a thermometer to record the temperature of the water 5. Repeat step 3 6. Boil at least 250ml of water 7. Empty the contents of the beaker and pour 100ml of boiled water into it. Use a thermometer to record the temperature of the water 8. Repeat step 3 9. Record your timed results in a table and repeat steps 1-5 to get a second set of data 10. Calculate the mean of the two sets of data and record it in your table
Part 2: Effect of Concentration 1. Pour 10ml of 0.1M HCl into the beaker 2. Place the piece of zinc metal into the beaker with the HCl 3. Using the timer, record the amount of time it takes the piece of metal to completely dissolve in the HCl 4. Record the results in your table 5. Repeat steps 1-4, changing the concentration of the HCl to 1.0M and 2.0M in each test 6. After completing one test with each of the three concentrations of HCl, repeat steps 1-5 to get a second set of data 7. Record your results and calculate the mean of the two sets of data and record it in your table
Part 3: Effect of Surface Area 1. Pour 100ml of water into a beaker 2. Drop one whole Alka Seltzer tablet into the water 3. Using the timer, record the amount of time it takes for the entire tablet to dissolve in the water 4. Empty the beaker and pour 100ml of water into it 5. Break the Alka Seltzer tablet into 4 even-sized chunks 6. Drop the 4 chunks into the water 7. Using the timer, record the amount of time it takes for the tablet chunks to dissolve in the water 8. Empty the beaker and pour 100ml of water into it 9. Crush one Alka Seltzer tablet completely using mortar and pestle 10. Drop the crushed tablet into the water, record the amount of time it takes for the crushed Alka Seltzer powder to finish reacting 11. Repeat steps 1-10 to get a second set of data 12. Determine the mean of the two sets of data and record it in your table
Part 4: Effect of the Presence of a Catalyst 1. Pour 3.5ml of hydrogen peroxide into the beaker 2. Place 3.5ml of CuCl₂ into the same beaker, observe the reactions and use the timer to record the amount of time the hydrogen peroxide takes to decompose 3. Rinse the beaker out 4. Pour 3.5ml of hydrogen peroxide into the beaker 5. Place 3.5ml of NaCl into the same beaker, observe the reactions and use the timer to record the amount of time the hydrogen peroxide takes to decompose 6. Rinse the beaker out 7. Pour 3.5ml of hydrogen peroxide into the beaker 8. Place 3.5ml of KI into the same beaker, observe the reactions and use the timer to record the amount of time the hydrogen peroxide takes to decompose 9. Record all of the observations and data into the data table 10. Repeat steps 1-9 for a second set of data 11. Calculate and record the mean of the two sets in your table