Ph Levels Lab Report
Lab on pH Levels
Purpose:
Throughout this experiment we are trying to learn how to take proper pH measurements using a pH meter. We also want to see the pH of different common liquids and record the change in pH when we add acids and alkaline liquids. The last reason we are conducting this experiment is to explain and show how fresh milk spoils by the change in pH.
Materials: In this experiment we used graduated cylinders and glass beakers and added variety of ingredients including 50 mL of; soda (preferably coke), milk, diluted lemon juice (10mL lemon juice, 40mL distilled water), tap water, and an antacid tablet. These ingredients have a different range of acidity levels, which we measured with a digital pH meter. We also used a beaker …show more content…
Then you want to take a graduated cylinder and measure out 50mL of tap water and then transfer it to a sterile 100mL beaker. You then repeat that step with soda and milk but make sure you are using a new clean beaker with each new ingredient. Now you will have to make the diluted lemon juice, to do this you want to add 10mL of lemon juice and 40mL of distilled water in a 100mL glass beaker. Using the pH meter test the pH of each of the liquids in the glass beakers. To use the pH meter efficiently you should turn it on and put it in the liquid while stirring it until there is a steady number. This is the number you will see on the screen showing the pH of the initial liquid. Record the data you found in the chart on page 3 of the packet. Next crush one antacid tablet with hammer and mix it into 50mL of distilled water. It is very important that you do not mix the tablet with tap water. Then take the pH meter and test the pH level of the new mixture and record it in your Antiacid-Soda Solution data sheet. Using the graduated cylinder measure out 10mL of the antacid mixture you just made and add it to the 50 mL beaker of soda. Mix the two …show more content…
The soda-antacid relationship and the milk-dilute lemon juice solution relationship are complete opposites. The slop of the soda-antacid relationship is an upward increasing while the milk-dilute lemon juice relationship is a downward decreasing slope.
4. As more dilute lemon juice is added to the milk the milk becomes something called curled and the color dramatically changes. Also one of the things that changed was the pH, it went from 7.06 which is closer to neutral base and then decreased to 5.09 after 30mL of dilute lemon juice is added.
5. The normal pH of blood in the human body is 7.4, for urine the pH level is 6.0. The normal pH for human saliva is 6.0-7.4 and the pH level for beer is 3.7-4.1.
6. Any pH less than 5.4 in a lake ecosystem would cause the fish not to be able to reproduce.
7. A buffer works by reacting with any added acid or base to control the pH.
8. Two examples of natural buffers include carbonate and bicarbonate, which play a huge role in regulating the body’s blood pH.
9. If one would have an upset stomach cause form excess acid, then chewing an antacid tablet will help reduce the discomfort because an antacid tablet is an artificial buffer that is made to help balance out the human bodies pH level when too much acidic things are
Purpose:
Throughout this experiment we are trying to learn how to take proper pH measurements using a pH meter. We also want to see the pH of different common liquids and record the change in pH when we add acids and alkaline liquids. The last reason we are conducting this experiment is to explain and show how fresh milk spoils by the change in pH.
Materials: In this experiment we used graduated cylinders and glass beakers and added variety of ingredients including 50 mL of; soda (preferably coke), milk, diluted lemon juice (10mL lemon juice, 40mL distilled water), tap water, and an antacid tablet. These ingredients have a different range of acidity levels, which we measured with a digital pH meter. We also used a beaker …show more content…
Then you want to take a graduated cylinder and measure out 50mL of tap water and then transfer it to a sterile 100mL beaker. You then repeat that step with soda and milk but make sure you are using a new clean beaker with each new ingredient. Now you will have to make the diluted lemon juice, to do this you want to add 10mL of lemon juice and 40mL of distilled water in a 100mL glass beaker. Using the pH meter test the pH of each of the liquids in the glass beakers. To use the pH meter efficiently you should turn it on and put it in the liquid while stirring it until there is a steady number. This is the number you will see on the screen showing the pH of the initial liquid. Record the data you found in the chart on page 3 of the packet. Next crush one antacid tablet with hammer and mix it into 50mL of distilled water. It is very important that you do not mix the tablet with tap water. Then take the pH meter and test the pH level of the new mixture and record it in your Antiacid-Soda Solution data sheet. Using the graduated cylinder measure out 10mL of the antacid mixture you just made and add it to the 50 mL beaker of soda. Mix the two …show more content…
The soda-antacid relationship and the milk-dilute lemon juice solution relationship are complete opposites. The slop of the soda-antacid relationship is an upward increasing while the milk-dilute lemon juice relationship is a downward decreasing slope.
4. As more dilute lemon juice is added to the milk the milk becomes something called curled and the color dramatically changes. Also one of the things that changed was the pH, it went from 7.06 which is closer to neutral base and then decreased to 5.09 after 30mL of dilute lemon juice is added.
5. The normal pH of blood in the human body is 7.4, for urine the pH level is 6.0. The normal pH for human saliva is 6.0-7.4 and the pH level for beer is 3.7-4.1.
6. Any pH less than 5.4 in a lake ecosystem would cause the fish not to be able to reproduce.
7. A buffer works by reacting with any added acid or base to control the pH.
8. Two examples of natural buffers include carbonate and bicarbonate, which play a huge role in regulating the body’s blood pH.
9. If one would have an upset stomach cause form excess acid, then chewing an antacid tablet will help reduce the discomfort because an antacid tablet is an artificial buffer that is made to help balance out the human bodies pH level when too much acidic things are