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AQA A Level chemistry
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anon25x
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Can the ka equation only be used for weak acids and strong bases ? Also when is the kw equation-ionic product of water- used please?
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ElegantLampshade
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See attached notes. Hope it helps.
If you're still unsure, watch this video about Kw... https://www.youtube.com/watch?v=_tCfeqnWdoM
Good luck!
If you're still unsure, watch this video about Kw... https://www.youtube.com/watch?v=_tCfeqnWdoM
Good luck!
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ElegantLampshade
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charco
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(Original post by anon25x)
Can the ka equation only be used for weak acids and strong bases ? Also when is the kw equation-ionic product of water- used please?
Can the ka equation only be used for weak acids and strong bases ? Also when is the kw equation-ionic product of water- used please?
In strong acids there is complete dissociation, so an equilibrium is effectively not established.
Ka should only be used for weak acids when the molecular acid, HA is in equilibrium with its conjugate base, A-.
HA(aq) <==> H+(aq) + A-(aq)
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