Answer
(a) Basic.
(b) Neutral.
(c) Acidic.
(d) Acidic.
Work Step by Step
If the pH value is less than 7.0, the solution is acidic.
If the pH value is equal to 7.0, the solution is neutral.
If the pH value is greater than 7.0, the solution is basic.
(a) 8.0 > 7.0: Basic;
(b) 7.0 = 7.0: Neutral;
(c) 3.5 < 7.0: Acidic;
(d) 6.1 < 7.0: Acidic;
