Question
Asked Sep 12, 2019
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You have a buffer with a pH of 10. You add a little bit of weak acid. What most likely will happen?
  
a) The pH goes to 7
b) The pH should stay at 10
c) The pH goes up to 11
d) The pH goes down to 9 
 
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Expert Answer

Step 1

A buffer solution resists changes in its pH when small quantities of acid or base are added to it. Given that, the pH of the buffer solution is 10 and a small amount of a weak acid is added to it.

Step 2

When a small amount of a weak acid is added to the buffer solution, it reacts with the conjugate base of the buffer system. However, as the concentration of the weak acid is less, the buffer solu...

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