If solution X has a pH of 6. Then X is:
Weak acid
Along the pH scale:
-acidic nature decreases with increasing pH value from 0 to 7;
-at pH 7, the solution is neutral;
-basic nature increases from 7 to 14.
Thus, if the pH value of a solution is slightly less than 7 (6 in this case), it is a weak acid in nature.