What best describes what the pH number indicates about a solution? O A. How acidic the solution is
B. What its ionic strength is
O C. How strong the acid is
O D. What the Ka constant is

A. How Acidic the solution is

Explanation: pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base.

i think it is d. e because the next one is igneous.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.