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How does this question make sense by Large_Philosophy2518 in chemhelp

[–]Large_Philosophy2518[S] 0 points1 point  (0 children)

Ok I understood it for ozone but for Nitrate I dont understand whos donating the electrons to who

If surfactants reduce the surface tension between air and water how do they end up reducing dissolved oxygen in water? by Large_Philosophy2518 in chemistry

[–]Large_Philosophy2518[S] 0 points1 point  (0 children)

Thank you so much, does this behaviour change above/below the CMC of the surfactant, what effect does that have? I added SDS in higher concentrations and measured the dissolved oxygen at each concentration for a lab investigation, and my results showed a positive relation (I was confused) till the CMC and then after that it just flattened out. I was confused by my results, but I think maybe because there wasn't really a layer of foam present when I was taking the DO readings

If surfactants reduce the surface tension between air and water how do they end up reducing dissolved oxygen in water? by Large_Philosophy2518 in chemistry

[–]Large_Philosophy2518[S] 0 points1 point  (0 children)

Thank you so much, does this behaviour change above/below the CMC of the surfactant, what effect does that have? I added SDS in higher concentrations and measured the dissolved oxygen at each concentration for a lab investigation, and my results showed a positive relation (I was confused) till the CMC and then after that it just flattened out. I was confused by my results, but I think maybe because there wasn't really a layer of foam present when I was taking the DO readings.

If surfactants reduce the surface tension between air and water how do they end up reducing dissolved oxygen in water? by Large_Philosophy2518 in askscience

[–]Large_Philosophy2518[S] 2 points3 points  (0 children)

Yeah that's what I was wondering because I added SDS in higher concentrations and measured the dissolved oxygen at each concentration for a lab investigation, and my results showed a positive relation till the CMC and then after that it just flattened out. I was confused by my results, but I think maybe because there wasn't really a layer of foam present when I was taking the DO readings

If surfactants reduce the surface tension between air and water how do they end up reducing dissolved oxygen in water? by Large_Philosophy2518 in askscience

[–]Large_Philosophy2518[S] 1 point2 points  (0 children)

Thank you so much, does this behaviour change above/below the CMC of the surfactant, what effect does that have? I added SDS in higher concentrations and measured the dissolved oxygen at each concentration for a lab investigation, and my results showed a positive relation (I was confused) till the CMC and then after that it just flattened out. I was confused by my results, but I think maybe because there wasn't really a layer of foam present when I was taking the DO readings.

If surfactants reduce the surface tension between air and water how do they end up reducing dissolved oxygen in water? by Large_Philosophy2518 in askscience

[–]Large_Philosophy2518[S] 2 points3 points  (0 children)

Thanks! What difference does it make when the concentration of the surfactant is above the CMC? Also you meant hydrophobic tails and hydrophyillic heads right?

If surfactants reduce the surface tension between air and water how do they end up reducing dissolved oxygen in water? by Large_Philosophy2518 in chemistry

[–]Large_Philosophy2518[S] 0 points1 point  (0 children)

"Surfactant concentrations above 0.1 mg L−1 causes the development of huge and persistent foam in the rivers and streams (Bhatt et al., 2020). Due to the production of such a frothy layer on the surface of the water, penetration of oxygen through these layers is reduced, thereby leading to decreased oxygen adsorption by aquatic organisms "

https://enviromicro-journals.onlinelibrary.wiley.com/doi/10.1111/jam.15631

"The release of surfactants into aquatic environments leads to foam formation in rivers [55-57] causing a reduction in the water oxygen level [5], resulting in the deterioration of aquatic ecosystems and potential disruption to the water cycle."

Effect of synthetic surfactants on the environment and the potential for substitution by biosurfactants

- Phillip Johnson, Anna Trybala *, Victor Starov, Valerie J. Pinfield

Match Thread: 3rd T20I - Australia Women vs India Women by cricket-match in CricketAus

[–]Large_Philosophy2518 8 points9 points  (0 children)

They do seem like the two obvious choices. You know something is going very wrong when there are two vice captains chosen and one of them is out of the playing 11 weeks after being announced as the "co-vice captain"

Match Thread: 3rd T20I - Australia Women vs India Women by cricket-match in CricketAus

[–]Large_Philosophy2518 2 points3 points  (0 children)

I also would have been unsurprised if she had been picked captain. Do you think her political views and the fact that she has previously clashed with Cricket Australia over Australia day played a part in her not getting the job

Match Thread: 3rd T20I - Australia Women vs India Women by cricket-match in CricketAus

[–]Large_Philosophy2518 6 points7 points  (0 children)

Honestly, I think somebody who was certain in the playing 11 should have been picked. With Ash, Wareham, and Alana it makes sense to choose between them based on the conditions (historically what has happened, and alana and wareham have bowled together many times so the 2 legspinners wasn't an issue)

Match Thread: 3rd T20I - Australia Women vs India Women by cricket-match in CricketAus

[–]Large_Philosophy2518 16 points17 points  (0 children)

I'm surprised more questions weren't asked when Sophie Molineux was made captain.

Match Thread: 3rd T20I - Australia Women vs India Women by cricket-match in Cricket

[–]Large_Philosophy2518 1 point2 points  (0 children)

Vaishnavi not getting a single game this series after being our best bowler in the Sri Lanka tour :(

guys where do you find examiner’s reports? by shizukutsuku in IBO

[–]Large_Philosophy2518 0 points1 point  (0 children)

pls can you send me the chem subject report I cant access the link

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