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A solution of \( \mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3} \) is standardized iodometrically against \( 0.1336 \mathrm{~g} \) of \( \mathrm{KBrO}_{3} \). This
\( \mathrm{P} \) process required \( 40 \mathrm{ml} \) of the \( \mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3} \) solution. W What is the strength of the \( \mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3} \) ? \( (\mathrm{K}=39 \), \( \mathrm{Br}=80) \)
(a) \( 0.04 \mathrm{M} \)
(b) \( 0.02 \mathrm{M} \)
(c) \( 0.05 \mathrm{M} \)
(d) \( 0.01 \mathrm{M} \)
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