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    is it because strong acids fully dissociate so then for weak acids we have to use Ka only

    So can Ka also be used for strong acids or am I wasting my time?
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    Yeah strong acids full dissociate therefore there is no equilibrium. Ka is just a type of equilibrium constant with a few assumptions involved in calculation.
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    (Original post by black1blade)
    Yeah strong acids full dissociate therefore there is no equilibrium. Ka is just a type of equilibrium constant with a few assumptions involved in calculation.
    Thank you

    just another point to clarify with you:

    strong and weak acids, when dissolved in water, have the backwards and forwards sign.

    Is it right in me saying that :

    weak acids have the backwards and forwards sign BUT strong acids fully dissociate so we can kinda think of them being a one way reaction
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    (Original post by Frank Peters)
    Thank you

    just another point to clarify with you:

    strong and weak acids, when dissolved in water, have the backwards and forwards sign.

    Is it right in me saying that :

    weak acids have the backwards and forwards sign BUT strong acids fully dissociate so we can kinda think of them being a one way reaction
    Yeah strong acids fully dissociate so you shouldn't use the equilibrium sign in most scenarios.
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    (Original post by Frank Peters)
    is it because strong acids fully dissociate so then for weak acids we have to use Ka only

    So can Ka also be used for strong acids or am I wasting my time?
    In the case of strong acids, we use Kw as all [H+] ions from the acid is turned into product. As weak acids do not fully dissociate this means we can no longer use this hence Ka was made kinda as a substitution of this for weak acids.
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    (Original post by S.H.Rahman)
    In the case of strong acids, we use Kw as all [H+] ions from the acid is turned into product. As weak acids do not fully dissociate this means we can no longer use this hence Ka was made kinda as a substitution of this for weak acids.
    Sorry, that's not correct

    Kw can be used for solutions of strong acids, or weak acids or mixtures of acids or for when no acid present. (It can be used for solutions of bases too, again strong or weak).
    It is unrelated to Ka.
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    (Original post by TutorsChemistry)
    Sorry, that's not correct

    Kw can be used for solutions of strong acids, or weak acids or mixtures of acids or for when no acid present. (It can be used for solutions of bases too, again strong or weak).
    It is unrelated to Ka.
    Ah ok. Thanks for letting me know!
 
 
 
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