The Henderson-Hasselbalch equation allows you to...

Question

The Henderson-Hasselbalch equation allows you to:

1. calculate the pH of a solution that contains HCH3CO2 and NaCH3CO2
2. determine the molecular weight of an acid from its pH alone
3. calculate the pH of .1 M HCH3CO2
4. all of the above

Answer 1

Here is the Henderson Hasselbalch equation for the acetate buffer in question:

pH = pKa + log [NaCH3CO2] / [HCH3CO2]

1. calculate the pH of a solution that contains HCH3CO2 and NaCH3CO2 YES
2. determine the molecular weight of an acid from its pH alone NO
3. calculate the pH of .1 M HCH3CO2 NO
4. all of the above NO