Answer:
The water in the tank is basic.
Explanation:
Acidity or basicity of an aqueous solution is determined through it pH value.
[tex]pH=-log[H^{+}][/tex] , where [tex][H^{+}][/tex] is concentration of [tex]H^{+}[/tex] (in molarity) in solution.
As a matter of fact, a pH scale has been established such as:
Acidic ([tex]0\leqslant pH<7[/tex]), Neutral ([tex]pH=7[/tex]) and Basic ([tex]7<pH\leqslant 14[/tex])
As pH = 8.0 lies in the basic range of pH scale therefore the water in the tank is basic.