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Molar Concentrations

Calculate the molar concentrations, I-, disulfur octaoxide, disulfur trioxide.
From [stock concentrations] 15 ml of .20 M potassium iodine, 20 ml of .10M K2S2O8, and 10 ml of .0050M Na2S2O3, I am supposed to figure out the molar concentrations of I-, disulfur octaoxide, and disulfur trioxide.

First I thought just use the concentration and volume of each stock concentration to find the moles...but I got stock. How do I use the information I wrote down to figure how to find the molar concentrations of the above. :(

Solution Preview

What you need to do is find the moles of each, like you stated.
Then you need ...

Solution Summary

From [stock concentrations] 15 ml of .20 M potassium iodine, 20 ml of .10M K2S2O8, and 10 ml of .0050M Na2S2O3, I am supposed to figure out the molar concentrations of I-, disulfur octaoxide, and disulfur trioxide.

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