One particular pungent gas is the toxic hydrogen sulphide (H2S). Hydrogen sulphide develops an odour of rotten eggs at a partial pressure of 0.13 ppm or 0.0132 Pa. If the aqueous concentration of hydrogen sulphide in the stream is 2.5 x 10–6 M, determine through calculations if the hydrogen sulphide in the water may be responsible for the odour detected near the vicinity of the stream. KH (H2S) = 0.087 M/atm)
(a) One particular pungent gas is the toxic hydrogen sulphide (H2S). Hydrogen sulphide develops an odour of rotten eggs at a partial pressure of 0.13 ppm or 0.0132 Pa. If the aqueous concentration of hydrogen sulphide in the stream is 2.5 x 10–6 M, determine through calculations if the hydrogen sulphide in the water may be responsible for the odour detected near the vicinity of the stream. KH (H2S) = 0.087 M/atm)
(b) In the leachate pond the conditions are more acidic causing NH3 to exist as NH4+. NH4+ can react with nitrites in the pond to form the less hazardous N2 and H2O as seen below:
NH4+ + NO2– → N2 + 2H2O
You want to investigate methods of
|
Experiment Number |
Initial NH4+ M |
Initial NO2– |
Initial Rate (M/s) |
|
1 |
0.0100 |
0.200 |
5.4 x 10 –7 |
|
2 |
0.0400 |
0.200 |
21.5 x 10 –7 |
|
3 |
0.200 |
0.0404 |
21.6 x 10 –7 |
|
4 |
0.0200 |
0.200 |
10.8 x 10 –7 |
|
5 |
0.200 |
0.0202 |
10.8 x 10 –7 |
|
6 |
0.200 |
0.0808 |
43.3 x 10 –7 |
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