Answer:
The last one about the citrus farm. This is because they are farming on land or landscape and citrus is a culture of Arizona.
I think false positive, Hope that was correct.
<u>The acids DO NOT return the pink phenolphthalein indicator. </u>Phenolphthalein in acidic solutions remains colorless but in basic solutions takes a pink color. Phenolphthalein is a weak acid. The indicator changes color, it can be magenta or pink with a pH value of 10.
5, 6, 7, 4, I believe it’s those