ewce09.azraftaohid.me/L1T1/CHEM 102/Notes/General/Prep for Viva.md

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Created: "2023-08-09T04:29:00.0000000"
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Outline:
Produce I2, hold I2, produce I- with Na2S2O3

Why NaHCO3 is added:
One of the main reasons of Iodometric titrations is the missing of Iodide which can happen for reasons ranging from air oxidation to vaporization/evaporation. That is because Iodide ion is very reactive. NaHCO3 reacts with iodine to form a harmless product NaI.

Why NH4SCN:
![](Resources/spxsqngggm.png)

Created: "2023-08-09T04:29:00.0000000"

Outline: Produce I2, hold I2, produce I- with Na2S2O3

Why NaHCO3 is added: One of the main reasons of Iodometric titrations is the missing of Iodide which can happen for reasons ranging from air oxidation to vaporization/evaporation. That is because Iodide ion is very reactive. NaHCO3 reacts with iodine to form a harmless product NaI.

Why NH4SCN:

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