Household Acids & Bases
Materials for this lab:
1 computer
1 Vernier computer interface
1 Logger Pro
1 pH sensor
1 wash bottle
distilled water
1 sensor soaking solution
household solutions
8 test tubes
1 test tube rack
blue litmus paper
paper towels
1 stirring rod
red cabbage juice
200 mL beaker
1 pair of glasses
This lab was comprised of three sperate tests. We filled eight test tubes with 3mL of every seperate solution, then tested on drop of each solution on a piece of litmus paper. You can find the results under Blue Litmus. Then, we tested the Red Cabbage Juice. We put 3mL of cabbage juice into each test tube. We mixed the new solution, then copared colors with our previous experiment. The results of this test are found under the color table. We then rinsed out the tubes, and added 3mL of solution. We then used our Vernier Logger program, opening “21 Household Acids and Bases” from the Vernier Folder. Next, my group used a PH sensor to measure each solution. In between each test we washed the sensor with distilled water. We then checked on our screen to see the real pH, which is recorded below.
This is a complete graph of our 3 experiments
In these experiments my group discovered that the blue litmus paper was more accurate in terms of pH values than the red cabbage juice was. I predict that this is because the cabbage juice could not have been purely red cabbage juice, and that could have skewed the results. I think the litmus paper is a slightly better testing agent because it is simply the solution and the paper, leaving minimal opportunities for the results to be skewed.
Materials for this lab:
1 computer
1 Vernier computer interface
1 Logger Pro
1 pH sensor
1 wash bottle
distilled water
1 sensor soaking solution
household solutions
8 test tubes
1 test tube rack
blue litmus paper
paper towels
1 stirring rod
red cabbage juice
200 mL beaker
1 pair of glasses
This lab was comprised of three sperate tests. We filled eight test tubes with 3mL of every seperate solution, then tested on drop of each solution on a piece of litmus paper. You can find the results under Blue Litmus. Then, we tested the Red Cabbage Juice. We put 3mL of cabbage juice into each test tube. We mixed the new solution, then copared colors with our previous experiment. The results of this test are found under the color table. We then rinsed out the tubes, and added 3mL of solution. We then used our Vernier Logger program, opening “21 Household Acids and Bases” from the Vernier Folder. Next, my group used a PH sensor to measure each solution. In between each test we washed the sensor with distilled water. We then checked on our screen to see the real pH, which is recorded below.
This is a complete graph of our 3 experiments
| Test # | Solution | Blue Litmus | Red Juice | pH |
| 1 | drain cleaner | bleached white | 5.2 | 11.00 |
| 2 | lemon juice | 2.5 | 4.5 | 2.17 |
| 3 | vinegar | 3 | 4 | 2.48 |
| 4 | ammonia | 9.7 | 6 | 11.28 |
| 5 | skim milk | 9 | 8.5 | 6.44 |
| 6 | coca-cola | 2.9 | 1 | 2.48 |
| 7 | baking soda | 9 | 7 | 8.10 |
| 8 | detergent | 10.5 | 6 | 9.55 |
In these experiments my group discovered that the blue litmus paper was more accurate in terms of pH values than the red cabbage juice was. I predict that this is because the cabbage juice could not have been purely red cabbage juice, and that could have skewed the results. I think the litmus paper is a slightly better testing agent because it is simply the solution and the paper, leaving minimal opportunities for the results to be skewed.
