\textbf{229 --} How many milliliters of potassium hydroxide solution with $\text{pH} = 13$ are needed for the complete reaction with 25 milliliters of $4\,\text{mol.L}^{-1}$ sulfuric acid solution?
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(1) $50$ \hfill (2) $100$ \hfill (3) $200$ \hfill (4) $250$
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