【Daily Question】May 7, 2018 – Participate to earn +2 wealth； +3 to +10 wealth for correct answers

2018-05-07View Original

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Fill-in-the-blank: When determining the purity of BaCl2 using the indirect iodometry method, Ba2+ is first precipitated as Ba(IO3)2; after washing, it is dissolved and acidified. Excess KI is added, followed by titration with a standard Na2S2O3 solution. What is the stoichiometric relationship between BaCl2 and Na2S2O3? （） 1:12

Reply #22018-05-07

BaCl2---Ba(IO3)2-----6I2-----12Na2S2O3

Reply #32018-05-07

BaCl2---Ba(IO3)2-----6I2-----12Na2S2O3

Reply #42018-05-07

BaCl2---Ba(IO3)2-----6I2-----12Na2S2O3

Reply #52018-05-07

BaCl2---Ba(IO3)2-----6I2-----12Na2S2O3

Reply #62018-05-07

BaCl2---Ba(IO3)2-----6I2-----12Na2S2O3

Reply #72018-05-07

BaCl2---Ba(IO3)2-----6I2-----12Na2S2O3

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