Problem- 1 what is the concentration of s2o32-aq in a, Ask an Expert

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Problem- 1) What is the concentration of S2O3^2-(aq) in a solution prepared by mixing 10.00 mL of .0050 M Na2S203 (aq) with enough .200 M KCl (aq) to make 50.0 mL of solution? (Assume volumes are additive and that there is no chemical reaction between the compounds involved.)
2. If all the S2O3^2- (aq) in the solution above is completely reacted with another substance over a 35.0 second period, what is the rate of decrease of the S203^2- (aq) in the solution? (Assume no volume change occurs.)

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