Place two test tubes in test tube rack. Step 02 Using a 10-mL graduated cylinder, add 2 mL of 1 M hydrochloric acid (HCl) to one of the tubes. Step 03 Rinse the graduated cylinder 3 times with your bottled water. Step 04 With the graduated cylinder, add 2 mL of 1 M sodium carbonate solution (Na2CO3) to the second test tube. Step 05 Record the color of the contents of each test tube in the Data Table. Step 06 Use the thermometer to measure the temperature of the hydrochloric acid. Record temperature in the Data Table. Rinse and dry thermometer as described above. Step 07 Repeat step 6 with sodium carbonate solution. Step 08 Combine the HCl of test tube 1 with Na2CO3 in test tube. Gently swirl to mix, and insert the thermometer. Step 09 Measure and record the temperature of the product (final temperature) in the Data Table. Step 10 Observe solution for 1 minute and record the final color and any additional observations. Step 11 Indicate in the Data Table whether a chemical or physical change has occurred and explain why. Step 12 Pour all solutions into the 250-mL beaker. Rinse the test tubes, thermometer, and