If a number has a pH of 7, it is neutral, therefore, one blank is neutral.
1. Neutral
Therefore, the element is not an acid or a base.
2. Acid, Base
That is NOT a balanced equation because:
c=4 o=2
c=4 o = 6
Not balanced, o has 6 and one side it has 4. It contradicts the Law of conversation of mass.