What is an acid?
pH of 0-7, releases H+ ions, [H+] > [OH-]
What is a base?
pH of 7-14, releases OH- ions (or takes up H+ ions), [OH-] > [H+]
What is a buffer?
compound that maintains pH by accepting or releasing H+ ions, bicarbonate & phosphate
MATERIALS:
- HCL
- NaOH
- Unknown A,B,C,D
- Distilled water
- Litmus paper
- pH paper
- Buffer pH 7
- Spot plate
- Test tubes
RECORDINGS:
EXPLANATION:
Classify, explain how the buffer worked? Baking soda + vinegar?
A buffer has a very stable pH. For instance, if you add acid or base to a buffered solution, its pH will not change significantly. Therefore when hydrogen ions are added to a buffer, they will be neutralized by the base in the buffer. Same will happen to hydroxide ions, which will be neutralized by the acid. These neutralization reactions will not have much effect on the overall pH of the buffer solution. *We did not use the baking soda or vinegar.
CONCLUSION:
Two questions that have arisen from your experiment.
1. Has their ever been an incident where a buffer was not able to work?
2. What can cause your body to have an out of balance pH?
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