Hydrochloric acid ((75.0 mathrm{~mL}) of (0.250 mathrm{M})) is added to 225.0 (mathrm{mL}) of (0.0550 mathrm{M} mathrm{Ba}(mathrm{OH})_{2}) solution.

Question:

Hydrochloric acid $(75.0 \mathrm{~mL}$ of $0.250 \mathrm{M})$ is added to 225.0 $\mathrm{mL}$ of $0.0550 \mathrm{M} \mathrm{Ba}(\mathrm{OH})_{2}$ solution. What is the concentration of the excess $\mathrm{H}^{+}$or $\mathrm{OH}^{-}$left in this solution?

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