Molarity of Na2S2O3 (stock solution).    0.100 M Volume of diluted bleach titrated (taken from the volumetric flask).  10ml Initial Burette Reading.  14.80 Final Burette Reading     25.60 Volume of Na2S2O3 used in the titration (mL).    10.80 Moles of Na2S2O3 used in the titration.   1.71 Moles of S2O3–2 used.     1.66 Moles of I2 initially present in titration mixture 0.83 Moles of NaOCl in the diluted bleach titrated.   0.415 Volume of bleach titrated. 1ml Mass of commercial bleaching solution titrated ?

Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter13: Electrochemistry
Section: Chapter Questions
Problem 13.30PAE
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Molarity of Na2S2O3 (stock solution).    0.100 M

Volume of diluted bleach titrated (taken from the volumetric flask).  10ml

Initial Burette Reading.  14.80

Final Burette Reading     25.60

Volume of Na2S2O3 used in the titration (mL).    10.80

Moles of Na2S2O3 used in the titration.   1.71

Moles of S2O3–2 used.     1.66

Moles of I2 initially present in titration mixture 0.83

Moles of NaOCl in the diluted bleach titrated.   0.415

Volume of bleach titrated. 1ml

Mass of commercial bleaching solution titrated ?

Important Equations:
NaOCI (ag) + 2 KI (aq) +2 HCI (aq)
I2 (aq) + 2 KCI (aq) +
Nacl (aq) + H2O (1)
colorless
colorless
reddish-brown
colorless
I2 (aq)
2 Na,S203 (aq)
2 Nal (aq) + Na,S,O6 (aq)
+
Reddish-brown
colorless
colorless
Transcribed Image Text:Important Equations: NaOCI (ag) + 2 KI (aq) +2 HCI (aq) I2 (aq) + 2 KCI (aq) + Nacl (aq) + H2O (1) colorless colorless reddish-brown colorless I2 (aq) 2 Na,S203 (aq) 2 Nal (aq) + Na,S,O6 (aq) + Reddish-brown colorless colorless
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