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can someone explain in simple terms......
- Thread starter t-byrd
- Start date
hi.
Redox and ORP (oxidation reduction potential) is pretty much interchangeable for laymen. In simple term, it is an electropotential measurement similar to pH that tell you how much a type of ion is present in the solution (salt water). For pH, the ion of interest is proton, while for ORP, any ion that can remove or add electron to another molecule.
Redox and ORP (oxidation reduction potential) is pretty much interchangeable for laymen. In simple term, it is an electropotential measurement similar to pH that tell you how much a type of ion is present in the solution (salt water). For pH, the ion of interest is proton, while for ORP, any ion that can remove or add electron to another molecule.
should i be testing for this? is it mostly a concern for people using
ozone?
im just confused on how it applies to a fishtank and if this is something i
should be testing for and all that.
for my new tank that im setting up, 120 that i plan to stock
with sps and clams eventually.
ozone?
im just confused on how it applies to a fishtank and if this is something i
should be testing for and all that.
for my new tank that im setting up, 120 that i plan to stock
with sps and clams eventually.
hi.
ORP is more tricky than pH, and most people who cares about ORP usually have the probe permenantly in the tank instead of "dip-stick" operation possible with pH.
I don't care about ORP that much, but for some setup, it is controlled by the use of ozone. O3 will increase the ORP because of the redox property of O3. ORP is a "health" measurement for aquaeous system because high bacteria level is related to low ORP measurement. A regular ORP measurement is about mid-300's mV for reef tank. Rather or not you want to monitor ORP is just a matter of personal preference. I don't really see any corelation between the use of ORP monitor and the health of the tank. However, richer reefer ususally have it together with a zillion other gadgets.
Ms. Orange, there is not much in there for you to pick. There is always a misconception about the role of oxygen in redox. Afterall, the word "oxidation" is related to "oxygen" etymologically speaking.
However, electron is what chemists care about when it comes to redox. You count the number of electrons in a molecule to find the oxidation state, for example. Oxygen is not necessary, but often associate with oxidation state, particularly when it comes to carbon (organic) chemistry.
For inorganic chemistry, oxygen may have nothing to do with redox reactions. For example, iron can be galvanized, electro-plated, or electrolly corrode with electricity, and iron ion in water can be reduced or oxidized in the absence of oxygen.
As an homework, list the oxidation number for the following molecules
CH4, CH3OH, CH2=O, CHOOH, CO2.
I am sure there is an article or two in the library of AAOM or Aquarium Frontiers related to this subject... check them out.
ORP is more tricky than pH, and most people who cares about ORP usually have the probe permenantly in the tank instead of "dip-stick" operation possible with pH.
I don't care about ORP that much, but for some setup, it is controlled by the use of ozone. O3 will increase the ORP because of the redox property of O3. ORP is a "health" measurement for aquaeous system because high bacteria level is related to low ORP measurement. A regular ORP measurement is about mid-300's mV for reef tank. Rather or not you want to monitor ORP is just a matter of personal preference. I don't really see any corelation between the use of ORP monitor and the health of the tank. However, richer reefer ususally have it together with a zillion other gadgets.
Ms. Orange, there is not much in there for you to pick. There is always a misconception about the role of oxygen in redox. Afterall, the word "oxidation" is related to "oxygen" etymologically speaking.
However, electron is what chemists care about when it comes to redox. You count the number of electrons in a molecule to find the oxidation state, for example. Oxygen is not necessary, but often associate with oxidation state, particularly when it comes to carbon (organic) chemistry.
For inorganic chemistry, oxygen may have nothing to do with redox reactions. For example, iron can be galvanized, electro-plated, or electrolly corrode with electricity, and iron ion in water can be reduced or oxidized in the absence of oxygen.
As an homework, list the oxidation number for the following molecules
CH4, CH3OH, CH2=O, CHOOH, CO2.
I am sure there is an article or two in the library of AAOM or Aquarium Frontiers related to this subject... check them out.
hi.Basically an ORP meter measures water purity.
ORP has nothing to do with purity. Ask the same guy what is the ORP measurement for a ultrapure water, and see what number he come up with. Then tell him your ORP in your tank, as well as telling him the reading for a ultrapure water with very small amount of toxins like cyanide, and ask him to judge the "purity" of water from the ORP measurements.
A biologically containmated water sample is usually low in ORP, and that's why it is used in water treatment plant. Other that than, I don't really see any connection between ORP and "purity"
O P Ing":1dhuy788 said:hi.
Redox and ORP (oxidation reduction potential) is pretty much interchangeable for laymen. In simple term, it is an electropotential measurement similar to pH that tell you how much a type of ion is present in the solution (salt water). For pH, the ion of interest is proton, while for ORP, any ion that can remove or add electron to another molecule.
Ok, Mr. Pea, I haven't performed an equation like that since 1981!
So, as I understand you, we're talking purely about an exchange of ions? This would be, as I understand it, not on a molecular level, but on an atomic level?
I think I pretty much understand what happens to substances in the presence of O3, because oxygen is unstable in that configuration and "wants" to "lose" the extra atom, correct? This would explain why O3 can cause oxidation, but not exactly what role it might play in redox (to my mind, at least).
It should say chemical, not just ion.......while for ORP, any ion that can remove or add electron to another molecule....
hi.So, as I understand you, we're talking purely about an exchange of ions? This would be, as I understand it, not on a molecular level, but on an atomic level?
The term ion is what prompt your misunderstanding quoted above, that's why I feel the word chemical should be used instead of "ion" in the statement.
ORP It has nothing to do with ion exchange. It is an electropotential property of solution. As suggested already, you may want to search on the AAOM or AF archive, since there will be more info there already than any of us can reiterate.
yes.I think I pretty much understand what happens to substances in the presence of O3, because oxygen is unstable in that configuration and "wants" to "lose" the extra atom, correct?
The presence of O3 increase the redox potential (electropotential) of the solution because of the oxidation property of it.This would explain why O3 can cause oxidation, but not exactly what role it might play in redox
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