Problem: If the pKa of HCHO2 is 3.74 and the pH of an HCHO 2/NaCHO2 solution is 3.89, which of the following is true?A) [HCHO2] < [NaCHO2]B) [HCHO2] > [NaCHO2]C) [HCHO2] = [NaCHO2]D) [HCHO2] >> [NaCHO2]E) It is not possible to make a buffer of this pH from HCHO 2 and NaCHO2
FREE Expert Solution
For this problem, we have to check which among the statements are true regarding a HCHO2/NaCHO2 buffer
Recall the Henderson-Hasselbalch equation:
- Using this particular equation, we can calculate or estimate pH by getting the pka and ratio of the concentration of the c.base (NaCHO2) and the weak acid (HCHO2)
Problem Details
If the pKa of HCHO2 is 3.74 and the pH of an HCHO 2/NaCHO2 solution is 3.89, which of the following is true?
A) [HCHO2] < [NaCHO2]
B) [HCHO2] > [NaCHO2]
C) [HCHO2] = [NaCHO2]
D) [HCHO2] >> [NaCHO2]
E) It is not possible to make a buffer of this pH from HCHO 2 and NaCHO2
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