In: Chemistry
This is part of a redox titration lab
"additional calculations, which focus on the orginal 10.00 mL sample of bleach.
7. Find the #of moles of CIO- in the original 10 mL sample of bleach
8. Find the mass of NaCIO in the original 10 mL sample of bleach
9. Find the total mass of the original 10 mL sample
This question is data deficient, you should given volume of hypo (sodium thiosulfate) solution used. Whatever I give idea to calculate above result by using following calculations.
Calculations to determine percent solution of NaClO in bleach:
(part A) X moles of Thiosulfate (S2O3 2-) = (volume of Na2S2O3 titrated in liters) * (number of moles used of Na2S2O3) (1 molS2O3 2- = 1 mol Na2S2O3)
(part B) X moles of I2 Produced = (Part A)/2 (2 mol S2O3 = 1 mol I2)
(part C) x moles of ClO- ion = (part B) (1 mol ClO- = 1 mol I2)
(part D) x mass (in grams) of NaOCl = (part c) *74.44g (molecular weight sodium thiosulfate. 1 mole ClO- = 1 mole NaOCl)