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katchum
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Does anyone know if a Na2CO3 solution will change in pH when you leave it for a month? Will the pH go up or down? I thought maybe the CO2 would escape which would make the pH go higher?
katchum said:Thanks for your info, but I still have some questions:
What is wrong with this deduction?
I've seen this equation:
CO3-- + H2O <=> HCO3- + OH-
Same reason that bicarbonate solutions are slightly alkaline...Then maybe: HCO3- + H2O <=> H2CO3 + OH-
You didn't specify if the solution's container is left open or closed. Anyway, consider that, even in a closed container, a standard made with such a solution cannot be used for analysis more than some days:katchum said:Does anyone know if a Na2CO3 solution will change in pH when you leave it for a month? Will the pH go up or down? I thought maybe the CO2 would escape which would make the pH go higher?
katchum said:For the second quiz I have no idea what the equilibrium of 5,6 pH means? The solution was at pH 12, and air doesn't have a pH?
The purpose of this test is to determine how the pH of a Na2CO3 solution changes over time, specifically after a month of storage. This information is important for understanding the stability and shelf life of the solution.
The process involves measuring the initial pH of the Na2CO3 solution and then storing it for a month. After a month, the solution is tested again for pH and the difference is recorded. This process is repeated multiple times to ensure accuracy.
Na2CO3, or sodium carbonate, is a commonly used chemical in many industries and is known to have a stable pH over time. This makes it a suitable substance for testing changes in pH over a longer period.
There are several factors that can affect the pH change of Na2CO3 solution, including temperature, exposure to air or light, and the purity of the solution. These should be controlled for during the testing process.
A significant pH change in Na2CO3 solution after a month could indicate instability or degradation of the solution, which could affect its effectiveness in various applications. This information can help inform decisions on storage and usage of the solution.