A solution containing bromate ions (BrO3) is reacted with excess iodide ions (1) producing iodine (12). The evolved iodine is then titrated with standard thiosulfate (S203²) solution. The pertinent reactions are given below: BrO¸¯ + 6I¯ +6H* →Br¯ +3I₂ + 3H₂O 3 excess 2- I₂ +2S₂O3²¯ →21¯ +S406²- Which of the following stoichiometric relationships between BrO3 and S₂03² is correct? #mmol BrO3 = 3/2(#mmol S₂O3²-) #mmol BrO3 = 1/6(#mmol S₂03²-) 3(#mmol BrO3) = 2(#mmol S₂03²-) #mmol BrO3 = 2(#mmol S₂03²)

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A solution containing bromate ions (BrO3) is reacted with excess iodide ions (1) producing
iodine (12). The evolved iodine is then titrated with standard thiosulfate (S₂03²) solution. The
pertinent reactions are given below:
BrO¸¯ +6I¯+6H* → Br¯+3I₂ + 3H₂O
3
excess
2-
I₂ +2S₂O3²- →21¯ +S₂O²¯
6
Which of the following stoichiometric relationships between BrO3 and S₂03² is correct?
#mmol BrO3 = 3/2(#mmol S₂03²-)
#mmol BrO3 = 1/6(#mmol S₂03²-)
3(#mmol BrO3) = 2(#mmol S₂O3²-)
#mmol BrO3 = 1/2(#mmol S₂03²)
Transcribed Image Text:A solution containing bromate ions (BrO3) is reacted with excess iodide ions (1) producing iodine (12). The evolved iodine is then titrated with standard thiosulfate (S₂03²) solution. The pertinent reactions are given below: BrO¸¯ +6I¯+6H* → Br¯+3I₂ + 3H₂O 3 excess 2- I₂ +2S₂O3²- →21¯ +S₂O²¯ 6 Which of the following stoichiometric relationships between BrO3 and S₂03² is correct? #mmol BrO3 = 3/2(#mmol S₂03²-) #mmol BrO3 = 1/6(#mmol S₂03²-) 3(#mmol BrO3) = 2(#mmol S₂O3²-) #mmol BrO3 = 1/2(#mmol S₂03²)
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