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Question
The concentration of an aqueous solution of Fe2+ can be determined by a redox titration with aqueous bromate ion, BrO3-:
Fe2+ (aq) + BrO3- (aq) + 6 H+ (aq) -> 6 Fe3+ (aq) + Br- (aq) + 3 H2O (l)
Assume that the black spheres in the buret represent BrO3- ions, the gray spheres in the flask represent Fe2+ ions, the concentration of the BrO3- ions in the buret is 0.120 M, and the volumes in the buret and the flask are identical. What is the concentration of the Fe2+ in the flask, and what fraction of the BrO3- solution in the buret must be added to the flask to react with all the Fe2+ ions?
A) 0.0200 M Fe2+; 1/18 of the BrO3- must be added.
B) 0.0200 M Fe2+; 1/3 of the BrO3- must be added.
C) 0.0400 M Fe2+; 1/18 of the BrO3- must be added.
D) 0.0400 M Fe2+; 1/3 of the BrO3- must be added.
Answer
This answer is hidden. It contains 1 characters.
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