Wow I have three associate degrees in horticulture and a bachelor's in plant science. I didn't understand a lot of what you were explaining but I definitely have a way better understanding of alkalinity in a pond, now. Thanks you!
The slide shown at 11:05 shows (at the bottom of the page) a definition of Alkalinity being [HCO3-] + 2[CO3-2] + [OH-] + [H+] - note in particular that the carbonate concentration is shown as multiplied by 2. In the following slide, the factor of 2 on the carbonate concentration is absent.Which is correct?
Belinda, do you know of the forumla to calculate Alkalinity if I have ph, co2, temperature and salinity. Can this be done or do I need any other inputs? This is for determining alkalinity in saltwater.
Just to make it more complicated: the explanation at 4 to 6 minutes that the precipitation of CaCO3 will drive the dissolution of atmospheric CO2 in water is not correct. The opposite is true: in the ocean, for every mole of CaCO3 precipitated, 0.6 moles of CO2 are RELEASED into the atmosphere. CaCO3 precipitation decreases the pH of the system, and the acidity drives CO2 out of the water. Equally, you can dissolved carbonate in water by adding CO2. So, it is not correct to use LeChatelier principle to explain the processes in the chain of reactions from CO2 dissolution to carbonate precipitations. Consider the reaction Ca2+ + 2 HCO3- CaCO3 + H2O + CO2(atm) . If you apply LeChatelier to this equation, then Carbonate precipitation will cause CO2 release into the atmosphere, not CO2 uptake from the atmosphere as explained in the video. So depending on how you formulate the process, LeChatelier considerations will give you different outcomes. Sorry, this is a brain twister and seems paradoxical. But LeChatelier is an approximation that only works on a simple single equilibrium equation, not a string of multiple equilibria. To memorize the effects of this complex system, it is best to think about alkalinity and pH: anything decreasing the pH of the water drives CO2 out of water, anything increasing pH will suck CO2 into the water.
I wish you could use a simple everyday language to describe it. like anime or something. when you use the technical words, many ordinary people will lost it. 😅. what is the relationship between CO2 and Alkalinity ? I am in Aquaculture.
This question is so vague that is impossible to answer. But in essence is the same. But you need to add all the fish 💩, algae formation, bacterial activity over rest of food…
At 9:50 you mean to say "carbonic acid", not "carboxylic acid". Given the other errors, suggest re-doing or removing this video, as it will create some confusion.
Wow I have three associate degrees in horticulture and a bachelor's in plant science. I didn't understand a lot of what you were explaining but I definitely have a way better understanding of alkalinity in a pond, now. Thanks you!
This is a terrific explanation of what is going on in my pool.
Belinda you’re just amazing, I can finally understand some alkalinity !
Thank you so much! It is well-explained and I use it as a reference to answer my chemistry worksheet. It really did help a lot. Again, Thank you.
Your contributions to UA-cam and education have been great thank you very much
Thanks Belinda! This is exactly what I have been searching for. Your video is knowledge nourishing😍
amazing. Thank you very much
Thank you so so much🥹 덕분에 이해안가던 내용들을 해결했어요!! 감사합니다
The slide shown at 11:05 shows (at the bottom of the page) a definition of Alkalinity being [HCO3-] + 2[CO3-2] + [OH-] + [H+] - note in particular that the carbonate concentration is shown as multiplied by 2. In the following slide, the factor of 2 on the carbonate concentration is absent.Which is correct?
why P alkalinity is equal to [OH]+1/2[CO3]?
Belinda, do you know of the forumla to calculate Alkalinity if I have ph, co2, temperature and salinity. Can this be done or do I need any other inputs? This is for determining alkalinity in saltwater.
Mercii
Can calcium carbonate used as carbon source for nitrification?
are you from baltimore?
Just to make it more complicated: the explanation at 4 to 6 minutes that the precipitation of CaCO3 will drive the dissolution of atmospheric CO2 in water is not correct. The opposite is true: in the ocean, for every mole of CaCO3 precipitated, 0.6 moles of CO2 are RELEASED into the atmosphere. CaCO3 precipitation decreases the pH of the system, and the acidity drives CO2 out of the water. Equally, you can dissolved carbonate in water by adding CO2. So, it is not correct to use LeChatelier principle to explain the processes in the chain of reactions from CO2 dissolution to carbonate precipitations. Consider the reaction Ca2+ + 2 HCO3- CaCO3 + H2O + CO2(atm) . If you apply LeChatelier to this equation, then Carbonate precipitation will cause CO2 release into the atmosphere, not CO2 uptake from the atmosphere as explained in the video. So depending on how you formulate the process, LeChatelier considerations will give you different outcomes. Sorry, this is a brain twister and seems paradoxical. But LeChatelier is an approximation that only works on a simple single equilibrium equation, not a string of multiple equilibria. To memorize the effects of this complex system, it is best to think about alkalinity and pH: anything decreasing the pH of the water drives CO2 out of water, anything increasing pH will suck CO2 into the water.
Thank Dr. so much
I think you misspoke at 10:38 … ¨100% of the system is bicarbonate, when you meant to say carbonate... ¨
Thanks
keep going
to the point!
i want know the partial and total alkalinity P/M as phosphate .. in drum of boilers . if you can please .
Thats what Im here for as well...
Thanks Madam
How to reduce alkalinity for large water like lake
acid rain?
hi...can you explain me what is TOTH for proton balance? thank you
I wish you could use a simple everyday language to describe it. like anime or something. when you use the technical words, many ordinary people will lost it. 😅.
what is the relationship between CO2 and Alkalinity ? I am in Aquaculture.
This question is so vague that is impossible to answer. But in essence is the same. But you need to add all the fish 💩, algae formation, bacterial activity over rest of food…
At 9:50 you mean to say "carbonic acid", not "carboxylic acid". Given the other errors, suggest re-doing or removing this video, as it will create some confusion.
Trying to understand
I should back up to comprehension theories