Oxidation numbers is the right answer
Answer:
Explanation:
It can be determined by measuring the Ph. D is incorrect.
C: is wrong because if you are making something acidic, you are increasing the H+
B: is the correct answer.
A: pH decreases. H+ increases which makes the Ph decrease. It is an oddity of the formula that makes this happen.
I believe this is a double replacement. As you can see none of the chemical symbols are missing, there just "replaced".