One litre of $0.15 \mathrm{M} \mathrm{Na}_2 \mathrm{SO}_3$ aqueous solution is mixed with $500 \mathrm{~mL}$…

One litre of $0.15 \mathrm{M} \mathrm{Na}_2 \mathrm{SO}_3$ aqueous solution is mixed with $500 \mathrm{~mL}$ of $0.2 \mathrm{M} \mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ aqueous solution in acid medium. What is the concentration (in $\mathrm{mol} \mathrm{L}^{-1}$ ) of unreacted $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ in the resultant solution?
  1. 1. $\frac{1}{3}$
  2. $\frac{1}{20}$
  3. $\frac{1}{300}$
  4. $\frac{1}{30}$

Solution

No solution. Refer to answer key.

Asked in: AP EAMCET 2017 (26 Apr Shift 2)

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