pH and pKa relationship for buffers | Chemistry | Khan Academy

How the Henderson-Hasselbalch equation can be used to look at the ratio of conjugate acid and base using relationship between buffer pH and pKa.
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[@garrettramos4044]

This was GREAT! I couldn't wrap my head around how to manipulate the equation to find the ratio of base to acid. All the other info I saw kept using examples with "live" figures. You explaining it without any specific numbers involved made it so much easier to see the relationships and follow the concepts. THANKS!!!!!!!!!!

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Garrett Ramos

[@mitsu_kyri]

Oh wow, this makes so much sense now! I always had such a hard time remembering if pH>pka would protonate or deprotonate a molecule and this suddenly helped make things click.

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This finally helped me understand the HH equation thank you!!!

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[@dikshitkapil4686]

I have a question here . How is the buffering related to the ph ? Is it that when HA= A- then the ph-pka is 0 and the buffering capacity is maximum?

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[@pickaxingoneuropa8457]

Thank You for all your help! This MAKES sense- so like 2 over 1- so 2 is greater than 1. so if A- is the numerator and HA is the denominator THEN A- is greater than the weak acid. OH THANK YOU THANK YOU THANK YOU! You ARE A GENIUS!

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Can someone tell me what ph is like not the meaning but the ph of what

[@cesaryescas9336]

pH is saying in English terms -log is the p in pH, and H is concentration of H3O+ a.k.a hydronium.

[@adrianparvez]

In this case, she's talking about the pH of the buffer solution

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