# chemistry

posted by .

In a buffer solution, if [Aƒ{] < [HA], which of the following must be true?
a. pH < pKa
b. pH = pKa
c. pH > pKa
d. pH < 7.00
e. pH > 7.00

• chemistry -

Here is the Henderson-Hasselbalch equation.
pH = pKa + log [(base)/(acid)].
base is A
acid is HA
If base < acid, the fraction must be less than 1, the log of a number less than 1 is negative; therefore, pH must be .....than pKa.

## Similar Questions

1. ### college chemistry

In the analysis of food, the nitrogen from the protein is sometimes converted into ammonia which is titrated against a strong acid. Given that the final NH3 concentration (approximate) is 0.2M and that pKa for NH4+ is 9.2, choose the …
2. ### CHEMISTRY

In the analysis of food, the nitrogen from the protein is sometimes converted into ammonia which is titrated against a strong acid. Given that the final NH3 concentration (approximate) is 0.2M and that pKa for NH4+ is 9.2, choose the …
3. ### Chemistry

the pka of acetone is CH3COCH3 is 19.3 which of these bases is strong enough to deprotonate acetone?
4. ### chemistry

i posted this already but i got the answer for someone elses question. the pka of acetone is CH3COCH3 is 19.3 which of these bases is strong enough to deprotonate acetone?
5. ### chemistry

i posted this already but i got the answer for someone elses question. the pka of acetone is CH3COCH3 is 19.3 which of these bases is strong enough to deprotonate acetone?
6. ### chemistry- titration

Once you have calculated your Ka value, use the data to find the concentration of the unknown acids. Vol. of acid solution=25mL concentration of NaOH used = 1M Buffer (pH) = 8.35 at 11.5mL 1/2 11.5=5.75mL which is a pH of 3.58 I did …
7. ### Chemistry

The pH of a buffer can be predicted using the Hendersen-Hasselbach equation: pH=pKa+ log([conjugate base][conjugate acid]) The choice of the conjugate acid-base pair (as you did in the previous questions) determines the pKa value to …
8. ### Chemistry

Which solution will have the lowest pH? a. 0.10 M HClO2, pKa = 1.96 b. 0.10 M HCN, pKa = 9.21 c. 0.10 M HF, pKa = 3.19 d. 0.10 M HClO, pKa = 7.538 e. 0.00010 M HCl Does the lower the pka stronger the acid, means the lower the ph, so
9. ### Chemistry

A buffer system contains 0.30 M NH4+ and 0.15 M NH3. pKa of NH4+ is 9.25. How many moles of NaOH must be added to 1.00 L of this solution to increase the pH to 9.25?
10. ### Chemistry

I have the answer to this question but the book does not explain WHY this is a good buffer solution?

More Similar Questions