The pH scale is a measurement system that indicates the concentration of H+ ions in a particular solution.
The best quality answer I would say that it is cC
Answer:
DE2
Explanation: for every one D+2 you need two E-1 because +2=-2
If it is blue litmus paper, it will remain blue. If it is red litmus paper, it will remain red. Water is neither an acid nor a base so it will not change the litmus paper.
