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Thread: stupid question about amphiprotic substances

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    stupid question about amphiprotic substances

    If HCO3^- is an amphiprotic substance meaning it can act as both acid and a base, won't its pH change at the same concentration? because if it acts as a base then wouldn't its pH be above 7 and if it acts as an acid its pH will be below 7

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    Not_the_pad Librah's Avatar
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    Re: stupid question about amphiprotic substances

    Bases are proton acceptors and acids are proton donors by definition, pH is only determined by the concentration of H3O+.
    Just a Realist.
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    Re: stupid question about amphiprotic substances

    Quote Originally Posted by Librah View Post
    Bases are proton acceptors and acids are proton donors by definition, pH is only determined by the concentration of H3O+.
    but I thought only acids will produce H3O+ in a solution

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    Re: stupid question about amphiprotic substances

    Quote Originally Posted by swagswagyoloswag View Post
    but I thought only acids will produce H3O+ in a solution
    I think your question boils down to, "what is an acid?" Which i said, something that acted as a proton donor. HCO3- can act as an acid or a base.
    Just a Realist.
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    GUESS WHO HAS A JOB INTERVIEW ON MONDAY FROM MACCAS?! ITS ME!!!!!
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    It's just a job interview lol

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    Re: stupid question about amphiprotic substances

    Amphiprotic substances can act as an acid or base, but not generally in the same conditions.

    for example, when NaHCO3 is dissolved in water, it acts as a base, because HCO3- has a greater tendency to accept protons from water than to donate. Hence, pH >7, and will not change once the reaction reaches equlibrium.

    However, if HCO3- is reacted with a base, it will have a greater tendency to donate protons, so it is acting as an acid in this case

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    Re: stupid question about amphiprotic substances

    ^ lol this guy

    EDIT: woops there was a guy that was spamming notes ad. not meant to belittle someone's answer :/
    Last edited by helloimyellow; 20 Jan 2016 at 7:32 PM.
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    Re: stupid question about amphiprotic substances

    Quote Originally Posted by helloimyellow View Post
    ^ lol this guy
    - Gets an ATAR of 97.25
    - Doesn't know where to post

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    Re: stupid question about amphiprotic substances

    Quote Originally Posted by BlueGas View Post
    - Gets an ATAR of 97.25
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    freaking annoying too
    When you're dead, you don't know you're dead. It's just difficult for others.
    It's the same when ur stupid

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