All acid base indicators (choose all that apply)
A) change color at different pH values
B) have more than one endpoint
C) change from red (pink) to blue and blue to red (pink)
D) are made from natural products

D

Explanation:

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.