acid and base lab
Acids and Bases Shane
Purpose- To study the relationship between pH and metabolism. 10/21/13
Materials- see attached Per. D Biology
Procedure- see attached
Data and Results- see attached
Theory-
PH stands for the power of hydrogen. People refer to the pH scale as a tool for finding out if a substance is acidic, basic, or neutral. This scale goes from zero to fourteen. The number seven is neutral. Any number higher than seven on this scale is basic. Any number lower is acidic. In this lab we have tested a number of substances on the pH scale and their effects when being poured on different colors of litmus paper. You can neutralize a base and an acid by combining the right amount between them. In the term H3O+ + OH- --> 2H2O you can see it neutralized. Just like in math if you add a negative to a positive they can neutralize each other out if it’s the same number or amount on both sides. In this lab we saw the effects of putting these substances on red and blue litmus paper. Depending on the color it turned we could tell if it was a negative or positive substance. One of the substances we tested was vinegar. This had a pH of around two or three and showed that it had the same effect on both pieces of litmus paper. It showed up negative. Another substance we tested was bleach. This substance has a pH of twelve and is a base. The effects it had on red litmus paper are different from the effects it had on blue litmus paper. It showed positive on red litmus and negative on blue. A buffer is added to acidic or base substances to get them to a certain pH state and prevent change from happening. This is important in agriculture, food processing, and medicine. Our body uses buffers to make sure our blood has a pH of 7. We also use buffers in reactions involving enzymes.
Conclusion-
After finishing this lab the data and results contained the pH of all the substances we tested and their effect on litmus paper. We also tested buffers and how
Purpose- To study the relationship between pH and metabolism. 10/21/13
Materials- see attached Per. D Biology
Procedure- see attached
Data and Results- see attached
Theory-
PH stands for the power of hydrogen. People refer to the pH scale as a tool for finding out if a substance is acidic, basic, or neutral. This scale goes from zero to fourteen. The number seven is neutral. Any number higher than seven on this scale is basic. Any number lower is acidic. In this lab we have tested a number of substances on the pH scale and their effects when being poured on different colors of litmus paper. You can neutralize a base and an acid by combining the right amount between them. In the term H3O+ + OH- --> 2H2O you can see it neutralized. Just like in math if you add a negative to a positive they can neutralize each other out if it’s the same number or amount on both sides. In this lab we saw the effects of putting these substances on red and blue litmus paper. Depending on the color it turned we could tell if it was a negative or positive substance. One of the substances we tested was vinegar. This had a pH of around two or three and showed that it had the same effect on both pieces of litmus paper. It showed up negative. Another substance we tested was bleach. This substance has a pH of twelve and is a base. The effects it had on red litmus paper are different from the effects it had on blue litmus paper. It showed positive on red litmus and negative on blue. A buffer is added to acidic or base substances to get them to a certain pH state and prevent change from happening. This is important in agriculture, food processing, and medicine. Our body uses buffers to make sure our blood has a pH of 7. We also use buffers in reactions involving enzymes.
Conclusion-
After finishing this lab the data and results contained the pH of all the substances we tested and their effect on litmus paper. We also tested buffers and how