Sodium Metabisulfite in SO2 production

[sharkman]

Some one here is going to have to let me know if this is correct.

Sodium Metabisulfite is chemically inter-changeable with Sodium Bisulfite. When Sodium meta-Bisulfite is hydrated, it is converted to Sodium Bisulfite.

Na2S2O5 + H2O ========== 2 Na H SO3

From a solution these products are inter-changeable.
Diffusing SO2 in a liquid lowers it's Ph.

This non chemically bonded SO2 is then slowly dispersed out of solution using aeration. Causing the Ph of the liquid to slowly rise.

If Sodium Metabisulfite is mixed into solution containing no H ions. No chemical reaction would take place. It then could be used through a dosing pump to lower the Ph of a system containing H ions (H2O). I am having trouble locating a solution to suspend Sodium Metabisulfite. So that it can run through a dosing pump. Any ideas on what I can use.

Can't run a dry chemical though a dosing pump very well.

 

[Navin A S]

Yes, your explanation of the chemical reaction between Sodium Metabisulfite and Sodium Bisulfite is correct. As for suspending Sodium Metabisulfite in a solution, you may want to consider using an aqueous solution of sodium hydroxide or sodium carbonate.

 

[quicknote]

I would like to confirm that your understanding of the chemical reactions involving Sodium Metabisulfite and Sodium Bisulfite is correct. The hydration of Sodium Metabisulfite does indeed convert it to Sodium Bisulfite, and both compounds are interchangeable in solution.

In terms of your question about suspending Sodium Metabisulfite for use in a dosing pump, one potential solution could be to create a slurry by mixing the compound with a liquid such as water or another solvent. This would allow for easier handling and dosing through a pump. Alternatively, you could also try using a different form of Sodium Metabisulfite, such as a powder or granular form, which may be easier to handle and dose. However, it is important to carefully consider the compatibility of the compound with the dosing pump and the system in which it will be used to ensure safe and effective use.