KIO3 + 5KI + 3H2SO4 -----> 3K2SO4 + 3H2O + 3 I2 I2 + 2Na2S2O3 -----> 2NaI + Na2S4O6 So 1 mole of KIO3 produces 3 moles of Iodine. 1 moles of iodine reacts with 2 moles of thiosulfate. So 6 ...
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.268 g of KIO3 is dissolved in 200 ml and then diluted to 500 ml. 1. Determine the number of moles of KIO3 that dissolved. [1] 2. Using 200 ml, calculate the molar concentration of KIO3, initially [1] 3. The solution is then diluted to 500 ml, calculate using C1V1 = C2V2 and determine the actual concentration of KIO3 used in the lab [2]
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.268 g of KIO3 is dissolved in 200 ml and then diluted to 500 ml. 1. Determine the number of moles of KIO3 that dissolved. [1] 2. Using 200 ml, calculate the molar concentration of KIO3, initially [1] 3. The solution is then diluted to 500 ml, calculate using C1V1 = C2V2 and determine the actual concentration of KIO3 used in the lab [2]
So 6 moles of sodium thiosulfate react with 1 mole of potassium iodate KIO3. The mole ratio between CaCO3 and CO2 is 1:1 because there is 1 mole of CaCO3 for every mole of CO2.
_____ moles \(\ce{KIO3}\) : _____ moles Vitamin C (ascorbic acid) Assuming that you want to use about 35 mL of \(\ce{KIO3}\) for your standardization titration in part A, about how many grams of ascorbic acid should you use? (you will need this calculation to start the lab). Show all work.
[1ΔS f (K+1 (aq)) + 1ΔS f (IO3-1 (aq))] - [1ΔS f (KIO3 (s))] [1(102.5) + 1(118.41)] - [1(151.46)] = 69.45 J/K 69.45 J/K (increase in entropy)
How many moles KIO3 do you have in 1.390 g KIO3. moles = grams KIO3/molar mass KIO3. Ignore the 100 mL. Now you know there is 1 mole IO3^- ions in 1 mole KIO3 and you know moles KIO3. so.