1) How many moles of S 2 O 3 2- are consumed for every mol of ClO - present in s
ID: 863510 • Letter: 1
Question
1) How many moles of S2O32- are consumed for every mol of ClO- present in solution?
2)
In this experiment, the purpose of the standardization reaction is
to convert the hypochlorite to triiodide (I3-)
to prevent side reactions which would reduce the precision of the experiment.
to activate the I3- so that it will react with the thiosulphate.
to precisely determine the concentration of the sodium thiosulphate titrant
3) A 10.0 mL sample of liquid bleach is diluted to 100. mL in a volumetric flask. A 25.0 mL aliquot of this solution is analyzed using the procedure in this experiment. If 12.6 mL of 0.30 M Na2S2O3 is needed to reach the equivalence point, what is the percent by mass NaClO in the bleach?
Hint: Percent by mass is grams of NaClO / mass of bleach. Presume a density for the bleach of 1.00 g/mL.
a.to convert the hypochlorite to triiodide (I3-)
b.to prevent side reactions which would reduce the precision of the experiment.
c.to activate the I3- so that it will react with the thiosulphate.
d.to precisely determine the concentration of the sodium thiosulphate titrant
Explanation / Answer
my answer is
to prevent side reactions which would reduce the precision of the experiment.
to prevent side reactions which would reduce the precision of the experiment.