pH Regulation

Practice Questions

Biochemistry › pH Regulation

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1

What is the concentration in an solution with a pH of ?

2

Calculate the pH of an ammonia buffer when the molar ratio of is . The pKa to be used is 9.75.

3

Is water an acid or a base?

4

What is the pOH of a solution of ?

5

What is buffering capacity?

6

If a patient's lab values from the doctor's office show a blood plasma pH of 7.1, which of the following could be the correct diagnosis?

7

If the pH of blood is considered to be 7.4 and the pKa of a compound in the blood is 6.4, what is the ratio of the acid form of the compound to the base form of the compound?

8

Listed below are the pKa values of five common biochemical buffers.

Formic acid: 3.75

Acetic acid: 4.76

2-(N-Morpholino)ethanesulfonic acid (MES): 6.09

Tris(hydroxymethyl)aminomethane (Tris): 8.08

Glycine: 9.78

Which of the following would have the best buffering capacity in a solution with pH 4.0?

9

What is the pOH of a 0.5 M solution?

10

If a patient's blood becomes acidic, which of the following will occur?

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