6. The ozone content in polluted air can be determined by an iodometric titration. The air...
6. The ozone content in polluted air can be determined by an iodometric titration. The air sample is bubbled through a buffered KI solution at a rate of 2.8 L/min for 1.5 hr. The density of the air sample is 1.17 g/L. The ozone is reduced by the iodide in the solution according to the following reaction.
O3 g+3 I- aq+2 H+ aq → O2 g+ I3- aq+H2O l
The resulting I3– is titrated with 0.00265 M Na2S2O3 requiring 9.84 mL to reach the endpoint.
2 S2O32- aq+I3- aq → S4O62- aq+3 I- aq
Determine the ozone content of the air sample in ppm (mg O3/kg air). (5 pts)
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6. The ozone content in polluted air can be determined by an
iodometric titration. The air...
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1. Moles of Reactant to Mass of Reactant: Identify the iodide ions and ozone in the...
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Can you do number 3 Construct and calculate a theoretical titration curve, showing and discussing all...
Can you do number 3
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Q 1(a) [13.33 Marks] Levels of dissolved oxygen in water can be determined by the Winkler method in the Leaving Certificate Chemistry course as follows: Under alkaline conditions manganese(II) sulphate produces a white precipitate of manganese(II) hydroxide: Mn2+(aq) + 2OH-(aq) → Mn(OH)2(s) This reacts with the dissolved oxygen to produce a brown precipitate. 2Mn(OH)2(s) + O2(aq) → 2MnO(OH)2(s) Addition of concentrated H2SO4 releases free iodine from KI. MnO(OH)2(s) + 4H+(aq) + 21-(aq) + Mn2+(aq) + 12(aq) + 3H2O(1) The free...
Can you do number 3
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