Any red flags out there?
Yes, lots. (Starting with SN and CL.) I don't want to be rude, but do you have any idea what you're doing at all?
What does iodate do? You haven't written an equation for it.
1 mL 0.01 N KIO3 (0.001944 moles total injected)
Where do you get this from?
1 mL 300ug/mL stannous chloride injected (0.000008 moles)
Where do you get this from?
4.3416 mL sodium thiosulfate titrated (0.01N) = 4.54131E-05 moles sodium thiosulfate
Where does this come from?
Molarity of Iodine = 1.36239E-05 (3/5 * 2.27066E-05)
Where does this come from?
Iodine titrated by sodium thiosulfate (mL) = 1.36239E-05 * 126.9 / 4.93 = 0.000350685
Are you working out mL of
solid iodine? And then subtracting it from mL of KIO
3? Why? And then where do you get the number 0.594 from? None of this makes any sense.
Let's start again. How many moles of iodate do you start with?
How many moles of iodine does this generate?
How many moles of thiosulfate were used in the titration?
How many moles of iodine does this correspond to?
So how many moles of iodine were consumed by reaction with Sn
2+?
So how many moles of Sn
2+ did you have?
So what was the concentration of your Sn
2+ solution?