Monday, June 6, 2011

Biology Multiple Choice?

A buffer:

a. changes pH by a magnitude of 10.

b. absorbs excess OH-

c. releases excess H+

d. is often a weak acid-base pair.

e. always maintains a neutral pH



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Also, how many times more basic is a substance with a pH of 11 compared to a substance with a pH of 7?Biology Multiple Choice?
A buffer is a solution that minimizes changes in pH which is made by adding a weak acid to its conjugate base



Its more of a chemistry question thoughBiology Multiple Choice?
e is the correct choice. I don't know about the second question though.
The answer is D , that is how it maintains the level it doesn't make it neutral it just adjusts it.
D is correct buffers are a mixture of a weak acid and its conjugate base or a weak base and its conjugate acid.



And for question 2 its the antilog of 4. Therefore its 10,000 stronger than a neutral pH. IT would be 10^(11-7). So 10^4.
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