What does a solution with a hydronium ion concentration of## 10^-11## M have a pH of?

##pH=11##

##pH=-log_10[H_3O^+]##

##[H_3O^+]=10^-11*mol*L^-1##

##-log_10[H_3O^+]=-log_10(10^-11)=-(-11)=11##.

Clearly, this is an aqueous solution. Is this an acidic or basic solution?

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