Answer:The strongest base with \(H^+]\) concentration is \([H^+]=10^{-12} M\).
Explanation:
\(pH=-\log[H^+]\)
Higher the pH value less will be the concentration of \([H^+]\) ion concentration and stronger will be the base.
1. \([H^+]=10^{-9} M\)
\(pH=-\log[10^{-9}]=9\)
2.\([H^+]=10^{-11} M\)
\(pH=-\log[10^{-11}]=11\)
3.\([H^+]=10^{-10} M\)
\(pH=-\log[10^{-10}]=10\)
4.\([H^+]=10^{-12} M\)
\(pH=-\log[10^{-12}]=12\)
The strongest base with \(H^+\)concentration is \([H^+]=10^{-12} M\).
