How does pH level change the concentration of dissolved oxygen (DO) in sea water?

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The equilibrium of dissolved-to-gas-phase oxygen is not affected by the aqueous hydronium ion concentration ($\ce{H3O+}$), and thus the pH of water does not affect dissolved oxygen concetrations of sea water.

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Sabudum
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Sabudum

Updated on August 01, 2022

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  • Sabudum
    Sabudum over 1 year

    I am planning to investigate the relationship between $\mathrm{pH}$ and dissolved oxygen.

    I would like to have a reason without taking in account the plants, animals and decomposer roles.

    I want to know if $\mathrm{pH}$ affects the concentration of dissolved oxygen. For example:

    If I added $\ce{HCl}$ to water, would the concentration of DO change? In same way, if I add $\ce{NaOH}$, would the concentration of DO change?

    • Ivan Neretin
      Ivan Neretin over 7 years
      In short: no, it does not, at least until you reach the truly extreme concentrations.