This can be done because we know that pH+pOH=14.
Here are our results' pOH values:
Water (with baking soda): 6
Windex: 4
Windex Solution: 5
Vinegar: 12
Vinegar Solution: 7
Heated Windex Solution (100 degrees Celsius): 5.5
Heated Windex Solution (58.5 degrees Celsius): 5.25
Also, here are pictures of our graphs so far regarding the regular pH of the substances that we have tested.
-Sarah Johns