[mahi123]

We did a lab in our class where we had 0.020 mol/L of potassium iodate solution(solution A) and 0.00100 mol/L of sodium bisulfite/hydrochloric acid/starch solution( solution B) and distilled water and two microtrays.

Now in microtray 1, in well 1 we put 1 drop of solution a , 2 drops in well 2 upto 10. Then we put 9 droplets of water in well 1, 8 in well 2 and so on 0 in well 10. Then we took that solution in each well and mixed it with 10 drops of solution B in microtray 2. So the Well in microtray which had the highest concentraiton of solution A took the longest( so 10 drops, which had no water). Now I have two questions, it asks to find the concentraiton of iodate.

(a) calculate initial concentration of iodate solution for each well in microtray 1, based on dilution from the concentration of the stock iodate solution

b) calculate initial concentration of iodate solution in each well at the instant of mixing with equal volume of solution B

If I knew what the question was trying to ask, I think i would be able to find teh answer, I just don't understand the questions. The rest of the questions are easy but I need the concentrations here to do them so if anyone who has done this experiment or familiar can help I would really appreciate it.


We determined the time it took for each solution in microtray 1 to react with solution in microtray 2, so do we use that to calculate the concentration??? And the number 0.020 mol/L of potassium iodate solution(solution A), we took lets say one droplet of it and put 9 drops of water,  how can we calculate concentration??