Explore BrainMass

Explore BrainMass

    Buffering capacity

    Not what you're looking for? Search our solutions OR ask your own Custom question.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    You want a solution that will buffer the addition of either 10 micromoles of acid or 10 micromoles of base. Total buffer concentration is equal to the concentration of the acid plus the concentration of salt of the acid. Which of the following buffers would you use if you wanted to buffer a solution at pH=6.9?

    a) buffer A with a pKa of 7.5 and buffer concentration of 10 nanomolar
    b) buffer B with a pKa of 6.6 and a buffer concentration of 10 micromolar
    c) buffer C with a pKa of 7.9 and a buffer concentration of 10 micromolar
    d) buffer D with a pKa of 6.6 and a buffer concentration of 100 micromolar
    e) buffer A with a pKa of 7.4 and a buffer concentration of 100 micromolar

    © BrainMass Inc. brainmass.com March 4, 2021, 10:24 pm ad1c9bdddf
    https://brainmass.com/chemistry/acid-and-base-organic-chemistry/buffering-capacity-micromoles-acid-327932

    Solution Preview

    Hi there,

    the answer is D. You can dismiss choices a, c and e, as their starting pH is either too far off, or the ...

    Solution Summary

    The buffering capacity for micromoles of acids are determined.

    $2.49

    ADVERTISEMENT