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Determine the concentration of the titrant in M. Calculate the dissolved oxygen (DO) content of the two water samples in ppm O2.

Determine the concentration of the titrant in M. Calculate the dissolved oxygen (DO) content of the two water samples in ppm O2.

Chemistry: An Atoms First Approach
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter6: Types Of Chemical Reactions And Solution Stoichiometry
Section: Chapter Questions
Problem 61E: What mass of solid AgBr is produced when 100.0 mL of 0.150 M AgNO3 is added to 20.0 mL of 1.00 M...
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Read the problem and answer the following questions. Reactions are attached in the picture

Yuno wants to assess the quality of water in the Clover Kingdom and the Heart Kingdom. In order to do this, he took a 200.0 ml sample (T= 20oC)  from the two areas and titrated them with sodium thiosulfate. The water from the Clover Kingdom used up 7.15 ml of the titrant while 7.65 ml where used on the Heart Kingdom’s water. 

Prior to this, 0.1000g of potassium iodate (FM: 214.01 g/mol; 99.97% purity) was weighed and subsequently dissolved in 150.0 ml of distilled water. He took 20.00 ml aliquot of this solution and added 20.00 ml of distilled water. He then treated the solution with potassium iodide and sulfuric acid. Finally, Yuno titrated the solution with 13.7 ml sodium thiosulfate titrant.

  1. Determine the concentration of the titrant in M.
  2. Calculate the dissolved oxygen (DO) content of the two water samples in ppm O2.
A. Standardization of KIO, B. Dissolved Oxygen Analysis 10, + 81 + 6H → 31, + 3H,O 0,+ 4Mn(ОН), (9 — 4МпО(ОН))+ 2H,0 + 2H20 25,0 +1, – S,0 + 31 2MNO(OH)) + 6H* + 21 -→ 2Mn + I, + 4H,0 I + I 215 I +r 215 25,0 +1, – S,0 + 31 I+ starch →I, - starch complex
Transcribed Image Text:A. Standardization of KIO, B. Dissolved Oxygen Analysis 10, + 81 + 6H → 31, + 3H,O 0,+ 4Mn(ОН), (9 — 4МпО(ОН))+ 2H,0 + 2H20 25,0 +1, – S,0 + 31 2MNO(OH)) + 6H* + 21 -→ 2Mn + I, + 4H,0 I + I 215 I +r 215 25,0 +1, – S,0 + 31 I+ starch →I, - starch complex
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