Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: sharbeldam on November 21, 2020, 05:11:06 PM

I did A.
But about B:
I did calculate the moles of acid > 0.01 moles of H+
I have 0.5L of my buffer (NaHSO4)
Can someone give me a hint of where to begin? I Did solve a few questions regarding finding out how much acid or base to add to buffer to get to a specific pH but this is different.

Assume protonation of sulfate is quantitative and follow the stoichiometry.

but do i just assume at first, like for instance make a buffer with 0.5 mole of sodium bisulfate and 0.5 mole of its salt and then try if the pH changes less than 10% once i add the hcl?

Assume the initial concentration is x and express the condition (not more than 10% change) using algebra and HendersonHasselbalch equation.
Then just solve for x.

Thank you borek
we appreciate you and this site.