The specific gravity of a given \( \mathrm{H}_{2} \mathrm{SO}_{4} \...
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The specific gravity of a given \( \mathrm{H}_{2} \mathrm{SO}_{4} \) solution is
\( \mathrm{P} \) 1.76. A quantity of \( 3.5 \mathrm{ml} \) of the acid is diluted to
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\( 1.0 \mathrm{~L} \) and \( 25 \mathrm{ml} \) of this diluted acid required 25.6 \( \mathrm{ml} \) of \( \mathrm{N} / 10(f=0.95) \mathrm{NaOH} \) solution for complete neutralization. The percentage strength (by mass) of the original acid solution is
(1) \( 61.6 \% \)
(2) \( 77.38 \% \)
(3) \( 50 \% \)
(4) \( 47.66 \% \)
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