| Formula | Color change of pH paper | pH as measured with pH paper | pH as measured with pH meter |
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
1. Do any of the solutions have different pHs when tested with the pH paper and the pH meter? Do you think these differences are significant? Why or why not?
2. What do you think could cause differences between these two measurement methods?
3. Is the data obtained by both of these methods qualitative or quantitative? Explain your choice(s).
4. If you had used litmus paper instead of either the pH paper or the pH meter and considering your answer in # 3, what type of data would you have gotten? (Litmus turns red in the presence of an acid and blue in the presence of a base.)